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Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Capital Market Fees [Member] | Interest Rate Related Instruments Customer and Mirror [Member] |  |
Derivative Impact on Performance [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 108 | $ (69)
Capital Market Fees [Member] | Foreign Exchange Forward [Member] |  |
Derivative Impact on Performance [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 70 | 9
Capital Market Fees [Member] | Commodity Contract [Member] |  |
Derivative Impact on Performance [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (886) | 198
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member] |  |
Derivative Impact on Performance [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 1,749 | 2,474
Mortgage Banking [Member] | Forward Contracts [Member] |  |
Derivative Impact on Performance [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ (606) | $ (2,749)

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- Definition [Line Items] for Derivative Impact on Performance [Table] + References No definition available. + Details
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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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