XML 134 R110.htm IDEA: XBRL DOCUMENT

Borrowings (Repurchase Agreements) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Borrowing Balance	$ 55,000us-gaap_BorrowedFunds
Securities Sold under Agreements to Repurchase [Member]
Debt Instrument [Line Items]
Borrowing Balance	977,816	1,265,000
Weighted Average Coupon	2.945%
Securities Sold under Agreements to Repurchase [Member] \| Due date: 6 13 2015 [Member]
Debt Instrument [Line Items]
Borrowing Balance	255,000
Weighted Average Coupon	0.84%
Settlement Date	Dec. 10, 2012
Investment Repurchase Agreement, Repurchase Date	Jun. 13, 2015
Securities Sold under Agreements to Repurchase [Member] \| Due date: 1 7 2015 [Member]
Debt Instrument [Line Items]
Borrowing Balance	24,100
Weighted Average Coupon	0.39%
Settlement Date	Dec. 18, 2014
Investment Repurchase Agreement, Repurchase Date	Jan. 07, 2015
Securities Sold under Agreements to Repurchase [Member] \| Due date: 1 5 2015 [Member]
Debt Instrument [Line Items]
Borrowing Balance	28,716
Weighted Average Coupon	0.39%
Settlement Date	Dec. 19, 2014
Investment Repurchase Agreement, Repurchase Date	Jan. 05, 2015
Securities Sold under Agreements to Repurchase [Member] \| Due date: 12 8 2016 [Member]
Debt Instrument [Line Items]
Borrowing Balance	170,000
Weighted Average Coupon	1.50%
Settlement Date	Dec. 06, 2012
Investment Repurchase Agreement, Repurchase Date	Dec. 08, 2016
Securities Sold under Agreements to Repurchase [Member] \| Due date: 3 2 2017 [Member]
Debt Instrument [Line Items]
Borrowing Balance	$ 500,000
Weighted Average Coupon	4.78%
Settlement Date	Mar. 02, 2007
Investment Repurchase Agreement, Repurchase Date	Mar. 02, 2017