| bg | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| bg | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| de | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| de | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| fr | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| fr | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| el | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| el | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| en | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| en | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| es | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| es | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| et | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| et | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| fi | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| fi | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| hr | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| hr | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| it | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| it | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| lt | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| lt | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| lv | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| lv | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| nl | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| nl | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| si | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| si | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| sk | http://www.xbrl.org/2010/role/message |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |
| sk | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0159: If [Existence ('4C7')] AND ('2B2' = "No") AND ('1C8' = "No") AND ('1C10' = "No") then '4C7'={$a} must be greater than or equal to 0 |