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Derivative Financial Instruments and Hedging Activities - Schedule of Changes in Notional Balance of Holdings of Derivatives (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Fair value of derivative assets (liabilities) at: |  |
Derivatives, at fair value | $ 11,620 | $ 6,367
Interest Rate Lock Commitments [Member] |  |
Derivative Notional Balance |  |
Beginning notional balance | 278,317 |
Additions | 5,200,747 |
Amortization | 0 |
Maturities | (3,879,488) |
Terminations | (1,109,562) |
Ending notional balance | $ 490,014 |
Maturity | Oct. 2016 - Jan. 2017 |
Fair value of derivative assets (liabilities) at: |  |
Derivatives, at fair value | $ 10,827 | 6,080
Forward MBS Trades [Member] |  |
Derivative Notional Balance |  |
Beginning notional balance | 632,720 |
Additions | 4,210,788 |
Amortization | 0 |
Maturities | (1,994,649) |
Terminations | (2,122,842) |
Ending notional balance | $ 726,017 |
Maturity | Dec. 2016 |
Fair value of derivative assets (liabilities) at: |  |
Derivatives, at fair value | $ (2,525) | 295
Interest Rate Caps [Member] |  |
Derivative Notional Balance |  |
Beginning notional balance | 2,110,000 |
Additions | 625,000 |
Amortization | (700,000) |
Maturities | 0 |
Terminations | (975,000) |
Ending notional balance | $ 1,060,000 |
Maturity | Nov. 2016 - July 2018 |
Fair value of derivative assets (liabilities) at: |  |
Derivatives, at fair value | $ 793 | $ 2,042

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 + Details
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