Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial assets:
Investment securities - available for sale	$ 588,119	$ 737,442
Investment securities, trading	8,516	7,502
Investment securities – held to maturity	10,205	8,438
Carrying Amount
Financial assets:
Investment securities - available for sale	588,119	737,442
Investment securities, trading	8,516	7,502
Total financial assets	4,283,781	4,272,870
Financial liabilities:
Total financial liabilities	4,099,015	4,100,332
Fair Value
Financial assets:
Investment securities - available for sale	588,119	737,442
Investment securities, trading	8,516	7,502
Total financial assets	4,280,258	4,281,047
Financial liabilities:
Total financial liabilities	4,101,747	4,105,987
Level 1 | Carrying Amount
Financial assets:
Cash and cash equivalents	63,385	48,456
Level 1 | Fair Value
Financial assets:
Cash and cash equivalents	63,385	48,456
Level 2 | Carrying Amount
Financial assets:
Investment securities – held to maturity	10,209	8,684
Loans held for sale	6,333	1,749
Financial liabilities:
Deposits	3,632,413	3,599,087
Short-term borrowings	207,828	252,367
Long-term FHLB advances	47,941	55,374
Subordinated notes	98,616	98,526
Junior subordinated debentures	21,665	21,580
Level 2 | Carrying Amount | Interest rate swaps
Financial assets:
Derivative assets	44,256	12,550
Financial liabilities:
Derivative liabilities	44,101	12,549
Level 2 | Carrying Amount | FX forwards
Financial assets:
Derivative assets	105	0
Financial liabilities:
Derivative liabilities	82	0
Level 2 | Carrying Amount | RPAs purchased
Financial assets:
Derivative assets	124	71
Level 2 | Carrying Amount | RPAs sold
Financial liabilities:
Derivative liabilities	19	2
Level 2 | Fair Value
Financial assets:
Investment securities – held to maturity	10,205	8,438
Loans held for sale	6,333	1,749
Financial liabilities:
Deposits	3,631,844	3,594,123
Short-term borrowings	207,828	252,367
Long-term FHLB advances	47,951	54,803
Subordinated notes	99,187	100,120
Junior subordinated debentures	24,385	31,176
Level 2 | Fair Value | Interest rate swaps
Financial assets:
Derivative assets	44,256	12,550
Financial liabilities:
Derivative liabilities	44,101	12,549
Level 2 | Fair Value | FX forwards
Financial assets:
Derivative assets	105	0
Financial liabilities:
Derivative liabilities	82	0
Level 2 | Fair Value | RPAs purchased
Financial assets:
Derivative assets	124	71
Level 2 | Fair Value | RPAs sold
Financial liabilities:
Derivative liabilities	19	2
Level 3 | Carrying Amount
Financial assets:
Net portfolio loans and leases	3,513,483	3,407,728
MSRs	4,744	5,047
Other assets	44,507	43,641
Financial liabilities:
Other liabilities	46,350	60,847
Level 3 | Fair Value
Financial assets:
Net portfolio loans and leases	3,509,533	3,414,921
MSRs	5,175	6,277
Other assets	44,507	43,641
Financial liabilities:
Other liabilities	$ 46,350	$ 60,847