Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial assets:
Investment securities - available for sale	$ 528,064	$ 689,202
Investment securities, trading	8,340	4,610
Investment securities – held to maturity	8,544	7,851
Carrying Amount
Financial assets:
Investment securities - available for sale	528,064	689,202
Investment securities, trading	8,340	4,610
Total financial assets	4,013,229	4,088,471
Financial liabilities:
Total financial liabilities	3,842,861	3,921,604
Fair Value
Financial assets:
Investment securities - available for sale	528,064	689,202
Investment securities, trading	8,340	4,610
Total financial assets	4,014,081	4,114,395
Financial liabilities:
Total financial liabilities	3,837,391	3,910,205
Level 1 | Carrying Amount
Financial assets:
Cash and cash equivalents	45,354	60,024
Level 1 | Fair Value
Financial assets:
Cash and cash equivalents	45,354	60,024
Level 2 | Carrying Amount
Financial assets:
Investment securities – held to maturity	8,916	7,932
Loans held for sale	4,111	3,794
Financial liabilities:
Deposits	3,357,226	3,373,798
Short-term borrowings	226,498	237,865
Long-term FHLB advances	72,841	139,140
Subordinated notes	98,482	98,416
Junior subordinated debentures	21,538	21,416
Level 2 | Carrying Amount | Interest rate swaps
Financial assets:
Derivative assets	5,843	1,895
Financial liabilities:
Derivative liabilities	5,843	1,895
Level 2 | Carrying Amount | RPAs purchased
Financial assets:
Derivative assets	43	21
Level 2 | Carrying Amount | RPAs sold
Financial liabilities:
Derivative liabilities	1	3
Level 2 | Fair Value
Financial assets:
Investment securities – held to maturity	8,544	7,851
Loans held for sale	4,111	3,794
Financial liabilities:
Deposits	3,351,183	3,368,276
Short-term borrowings	226,498	237,865
Long-term FHLB advances	71,978	138,685
Subordinated notes	97,892	95,044
Junior subordinated debentures	23,564	19,366
Level 2 | Fair Value | Interest rate swaps
Financial assets:
Derivative assets	5,843	1,895
Financial liabilities:
Derivative liabilities	5,843	1,895
Level 2 | Fair Value | RPAs purchased
Financial assets:
Derivative assets	43	21
Level 2 | Fair Value | RPAs sold
Financial liabilities:
Derivative liabilities	1	3
Level 3 | Carrying Amount
Financial assets:
Net portfolio loans and leases	3,362,791	3,268,333
MSRs	5,328	5,861
Other assets	44,439	46,799
Financial liabilities:
Other liabilities	60,432	49,071
Level 3 | Fair Value
Financial assets:
Net portfolio loans and leases	3,362,757	3,293,802
MSRs	6,586	6,397
Other assets	44,439	46,799
Financial liabilities:
Other liabilities	$ 60,432	$ 49,071