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Derivative Financial Instruments - Impact of Derivatives on Consolidated Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |
Total | $ 953 | $ (547) | $ 1,602 | $ 3,292 | $ 825 | $ 5,401 | $ (9,458) | $ (764) | $ 13,765 | $ 7,892 | $ 29,308
Interest Rate Swaps | Fair Value |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |
Hedge ineffectiveness gains (losses) recorded in earnings |  |  |  |  |  |  |  |  | 2,695 | 1,718 | (558)
Realized gains recorded in interest expense |  |  |  |  |  |  |  |  | 29,940 | 20,958 | 28,668
Total |  |  |  |  |  |  |  |  | 32,635 | 22,676 | 28,110
Interest Rate Swaps | Cash Flow |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | (22,902) | (9,590) | 0
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net |  |  |  |  |  |  |  |  | (1,427) | (520) | 0
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net |  |  |  |  |  |  |  |  | (21,475) | (9,070) | 0
Interest Rate Swaps | Trading |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |
Interest reclassification |  |  |  |  |  |  |  |  | 3,451 | (2,250) | 1,285
Change in fair value of future interest payments recorded in earnings |  |  |  |  |  |  |  |  | 581 | (2,944) | (87)
Total |  |  |  |  |  |  |  |  | $ 4,032 | $ (5,194) | $ 1,198

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- Definition Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Hedge Ineffectiveness + References No definition available. + Details
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- Definition Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Interest Reclassification + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Amount of gain (loss)recognized in the income statement from the hedging ineffectiveness of a fair value hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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