Fair Value Measurements (Details 3) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial assets:
Cash and due from banks	$ 175,145	$ 339,438
Securities held to maturity	50,288	2,425
Loans, net	2,518,108	2,357,837
Financial liabilities:
Junior subordinated debt owed to unconsolidated trusts	55,000	55,000
Carrying Amount | Level 1
Financial assets:
Cash and due from banks	175,145
Carrying Amount | Level 2
Financial assets:
Cash and due from banks		339,438
Securities held to maturity	49,812	2,373
Loans held for sale	15,694	10,400
Accrued interest receivable	13,187	11,187
Financial liabilities:
Deposits	3,110,530	2,900,848
Securities sold under agreements to repurchase	176,961	198,893
Long-term debt	50,000	50,000
Junior subordinated debt owed to unconsolidated trusts	55,000	55,000
Accrued interest payable	443	507
Carrying Amount | Level 3
Financial assets:
Loans, net	2,518,108	2,357,837
Fair Value | Level 1
Financial assets:
Cash and due from banks	175,145
Fair Value | Level 2
Financial assets:
Cash and due from banks		339,438
Securities held to maturity	50,288	2,425
Loans held for sale	16,007	10,634
Accrued interest receivable	13,187	11,187
Financial liabilities:
Deposits	3,110,047	2,900,763
Securities sold under agreements to repurchase	176,961	198,893
Long-term debt	50,000	50,000
Junior subordinated debt owed to unconsolidated trusts	55,000	55,000
Accrued interest payable	443	507
Fair Value | Level 3
Financial assets:
Loans, net	$ 2,522,316	$ 2,360,000