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Borrowings Under Repurchase Agreements - Remaining Maturities of Borrowings (Detail) - Line of Credit [Member] $ in Thousands | Mar. 31, 2017 USD ($)
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Line of Credit Facility [Line Items] |
Less than 1 year | $ 136,879
1 to 3 years | 1,350,356
3 to 5 years | 0
More than 5 years | 0
Total | 1,487,235
JP Morgan Chase [Member] |
Line of Credit Facility [Line Items] |
Less than 1 year | 29,251
1 to 3 years | 864,780
3 to 5 years | 0
More than 5 years | 0
Total | 894,031
Deutsche Bank Repurchase Facility [Member] |
Line of Credit Facility [Line Items] |
Less than 1 year | 0
1 to 3 years | 308,730
3 to 5 years | 0
More than 5 years | 0
Total | 308,730
Goldman Sachs [Member] |
Line of Credit Facility [Line Items] |
Less than 1 year | 5,290
1 to 3 years | 33,711
3 to 5 years | 0
More than 5 years | 0
Total | 39,001
UBS [Member] |
Line of Credit Facility [Line Items] |
Less than 1 year | 100,798
1 to 3 years | 0
3 to 5 years | 0
More than 5 years | 0
Total | 100,798
Deutsche Bank [Member] |
Line of Credit Facility [Line Items] |
Less than 1 year | 1,540
1 to 3 years | 143,135
3 to 5 years | 0
More than 5 years | 0
Total | $ 144,675

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