Fair Value Measurements (Details 3) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial assets:
Cash and due from banks	$ 289,385	$ 339,438
Securities held to maturity	36,005	2,425
Loans, net	2,443,040	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	289,385
Carrying Amount | Level 2
Financial assets:
Cash and due from banks		339,438
Securities held to maturity	35,992	2,373
Loans held for sale	23,816	10,400
Accrued interest receivable	11,949	11,187
Financial liabilities:
Deposits	3,135,740	2,900,848
Securities sold under agreements to repurchase	174,352	198,893
Long-term debt	50,000	50,000
Junior subordinated debt owed to unconsolidated trusts	55,000	55,000
Accrued interest payable	462	507
Carrying Amount | Level 3
Financial assets:
Loans, net	2,443,040	2,357,837
Fair Value | Level 1
Financial assets:
Cash and due from banks	289,385
Fair Value | Level 2
Financial assets:
Cash and due from banks		339,438
Securities held to maturity	36,005	2,425
Loans held for sale	24,274	10,634
Accrued interest receivable	11,949	11,187
Financial liabilities:
Deposits	3,135,168	2,900,763
Securities sold under agreements to repurchase	174,352	198,893
Long-term debt	50,000	50,000
Junior subordinated debt owed to unconsolidated trusts	55,000	55,000
Accrued interest payable	462	507
Fair Value | Level 3
Financial assets:
Loans, net	$ 2,446,119	$ 2,360,000