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Derivatives - Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Derivatives Fair Value [Line Items] |  |  |  |
Gains (losses) on derivative financial instruments | $ (5,361) | $ (3,325) | $ (5,739) | $ (4,810)
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Interest rate-lock commitments |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Gains (losses) on derivative financial instruments | (1,433) | 4,697 | 1,509 | 11,965
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Forward commitments |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Gains (losses) on derivative financial instruments | $ (3,928) | $ (8,022) | $ (7,248) | $ (16,775)

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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=64837297&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=64837297&loc=SL5624171-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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