| Proceeds from Sale and Maturity of Marketable Securities | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Proceeds from Sale and Maturity of Marketable Securities, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |