Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets and liabilities measured at fair value
Investment securities available for sale	$ 177,591	$ 132,981
Total derivative assets	2,678	3,283
Trust preferred securities
Assets and liabilities measured at fair value
Investment securities available for sale	38,691	37,624
Corporate debt securities
Assets and liabilities measured at fair value
Investment securities available for sale	135,590	92,077
Derivatives designated as hedging instruments
Assets and liabilities measured at fair value
Total derivative assets	400	476
Total derivative liabilities	7,504	8,484
Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value
Total derivative assets	2,278	2,807
Total derivative liabilities	2,353	2,741
Recurring
Assets and liabilities measured at fair value
Investment securities available for sale	177,591	132,981
Total derivative assets	2,678	3,283
Total derivative liabilities	9,857	11,225
Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets and liabilities measured at fair value
Investment securities available for sale	4,433	4,283
Recurring | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Investment securities available for sale	163,991	119,250
Total derivative assets	2,678	3,283
Total derivative liabilities	9,857	11,225
Recurring | Significant unobservable inputs (Level 3)
Assets and liabilities measured at fair value
Investment securities available for sale	9,167	9,448
Recurring | Trust preferred securities
Assets and liabilities measured at fair value
Investment securities available for sale	38,691	37,624
Recurring | Trust preferred securities | Quoted prices in active markets for identical assets (Level 1)
Assets and liabilities measured at fair value
Investment securities available for sale	4,433	4,283
Recurring | Trust preferred securities | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Investment securities available for sale	25,091	23,893
Recurring | Trust preferred securities | Significant unobservable inputs (Level 3)
Assets and liabilities measured at fair value
Investment securities available for sale	9,167	9,448
Recurring | Corporate debt securities
Assets and liabilities measured at fair value
Investment securities available for sale	135,590	92,077
Recurring | Corporate debt securities | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Investment securities available for sale	135,590	92,077
Recurring | Municipal securities
Assets and liabilities measured at fair value
Investment securities available for sale	3,310	3,280
Recurring | Municipal securities | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Investment securities available for sale	3,310	3,280
Recurring | Foreign exchange forward contracts
Assets and liabilities measured at fair value
Total derivative assets	23	52
Total derivative liabilities	4	5
Recurring | Foreign exchange forward contracts | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Total derivative assets	23	52
Total derivative liabilities	4	5
Recurring | Derivatives designated as hedging instruments | Cash flow hedges
Assets and liabilities measured at fair value
Total derivative liabilities	6,584	7,639
Recurring | Derivatives designated as hedging instruments | Fair value hedges
Assets and liabilities measured at fair value
Total derivative assets	400	476
Total derivative liabilities	920	845
Recurring | Derivatives designated as hedging instruments | Significant other observable inputs (Level 2) | Cash flow hedges
Assets and liabilities measured at fair value
Total derivative liabilities	6,584	7,639
Recurring | Derivatives designated as hedging instruments | Significant other observable inputs (Level 2) | Fair value hedges
Assets and liabilities measured at fair value
Total derivative assets	400	476
Total derivative liabilities	920	845
Recurring | Derivatives not designated as hedging instruments
Assets and liabilities measured at fair value
Total derivative assets	2,255	2,755
Total derivative liabilities	2,349	2,736
Recurring | Derivatives not designated as hedging instruments | Significant other observable inputs (Level 2)
Assets and liabilities measured at fair value
Total derivative assets	2,255	2,755
Total derivative liabilities	$ 2,349	$ 2,736