Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities Pledged as Collateral (Details)

v3.2.0.727
Available-for-Sale Securities Pledged as Collateral (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Available-for-sale Securities [Abstract]    
Available-for-sale Securities Pledged as Collateral $ 12,553,084 $ 14,159,315