Derivatives - (Derivatives on the Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	$ 76	$ (93)
Fair Value Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	1,064	(10,901)
Interest rate products [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on hedged items	(1,241)	10,239
Interest rate products [Member] \| Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on hedged items	(1,241)	10,239
Interest rate products [Member] \| Not Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	(32)	(93)
Interest rate products [Member] \| Fair Value Hedging [Member] \| Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	1,064	$ (10,901)
Forward Contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	(193)
Interest Rate Lock Commitments [Member] \| Not Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	123
Forward loan sales agreement \| Not Designated as Hedging Instrument [Member] \| Other Non-Interest income [Member]
Derivative [Line Items]
Amount of gain or (loss) recognized in income on derivatives	$ 178

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No definition available.

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- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ 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

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- Definition

Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

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