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Derivative Financial Instruments - Derivatives not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Asset Derivatives | Interest rate lock commitments |  |  |  |
Derivatives not designated as hedging instruments | $ (290) | $ 277 | $ 102 | $ 368
Liability Derivatives | Forward contracts |  |  |  |
Derivatives not designated as hedging instruments | 0 | (342) | 0 | (537)
Liability Derivatives | Interest rate lock commitments |  |  |  |
Derivatives not designated as hedging instruments | $ 642 | $ 0 | $ 645 | $ 0

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + 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 (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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