Offsetting Assets and Liabilties - Offsetting of Liabilties (Details) - Repurchase Agreements [Member] - USD ($) |
Dec. 31, 2016 |
Dec. 31, 2015 |
---|---|---|
Offsetting Liabilities [Line Items] | ||
Gross Amount Of Recognized Liabilties | $ 121,828,000 | $ 77,234,000 |
Gross Amount Of Liabilties Offset In The Balance Sheet | 0 | 0 |
Net Amount Of Liabilities Presented In The Balance Sheet | 121,828,000 | 77,234,000 |
Gross Amount Of Financial Instruments Posted Not Offset in Balance Sheet | (121,372,000) | (77,234,000) |
Gross Amounts Of Cash Posted Not Offset In Balance Sheet | (456,000) | 0 |
Net Amount Of Liabilities | $ 0 | $ 0 |