| en | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| en | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| de | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| de | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| fr | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| fr | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| el | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| el | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| es | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| es | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| et | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| et | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| fi | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| fi | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| it | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| it | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| lt | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| lt | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| lv | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| lv | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| nl | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| nl | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| si | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| si | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| sk | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| sk | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| bg | http://www.xbrl.org/2010/role/message |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |
| bg | http://www.xbrl.org/2010/role/terseMessage |
| srf_v0207: if ('1C7'="Yes" OR '1C8'="Yes") then '2A3'={$c} = 0 |