|
Available-for-Sale Securities Pledged as Collateral (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Available-for-sale Securities [Abstract] | ||
| Available-for-sale Securities Pledged as Collateral | $ 14,175,691us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral | $ 14,159,315us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The fair value of available-for-sale securities that serve as collateral for borrowings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|