Derivative Instruments and Hedging Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Agreement	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount reclassified from AOCI, before tax	$ 2,901	$ 0	$ 0
Amount reclassified from AOCI, net of tax	1,772	0	0
Derivatives Not Designated as Hedging Instruments [Member]
Credit value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]
Fair value adjustment	309	6,224
Derivatives Not Designated as Hedging Instruments [Member] | Interest Income [Member]
Gain or loss recognized in income on derivatives [Abstract]
Gain (loss) recognized in income on derivatives	95	33	88
Derivatives Not Designated as Hedging Instruments [Member] | Other Income [Member]
Gain or loss recognized in income on derivatives [Abstract]
Gain (loss) recognized in income on derivatives	$ 3,480	684	59
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of risk participation agreements held | Agreement	2
Credit value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]
Notional amount	$ 371,101	192,625
Derivatives Not Designated as Hedging Instruments [Member] | Risk Participation Agreements [Member]
Credit value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]
Notional amount	11,421	0
Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount reclassified from AOCI, before tax	2,901
Amount reclassified from AOCI, net of tax	1,772
Derivatives Designated as Hedging Instruments [Member] | Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of derivative asset	2,900
Derivatives Designated as Hedging Instruments [Member] | Other Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of derivative liability	200
Derivatives Designated as Hedging Instruments [Member] | Interest Expense [Member]
Gain or loss recognized in income on derivatives [Abstract]
Gain (loss) recognized in income on derivatives	(70)	0	$ 0
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Derivatives [Member]
Credit value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]
Fair value adjustment	2,704	0
Notional amount	$ 250,000	$ 0