Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Carrying amounts and estimated fair values of financial instruments:
Securities available for sale	$ 124,078	$ 173,041	$ 186,634
Securities held to maturity	57,612	56,700	58,376
Total loans, net of allowance	2,388,589	2,414,689	2,380,011
Accrued interest receivable	8,795	9,649	9,780
FDIC indemnification asset	29,406	48,622	92,950
Bank-owned life insurance	44,685	44,040	43,276
Accrued interest payable	778	879	1,071
Carrying Amount [Member]
Carrying amounts and estimated fair values of financial instruments:
Cash and due from banks, noninterest-bearing	92,633	83,881
Due from banks, interest-bearing	313,141	136,644
Federal funds sold	1,508	2,749
Securities available for sale	124,078	173,041
Securities held to maturity	53,879	53,995
Presold mortgages in process of settlement	5,926	5,422
Total loans, net of allowance	2,388,589	2,414,689
Accrued interest receivable	8,795	9,649
FDIC indemnification asset	29,406	48,622
Bank-owned life insurance	44,685	44,040
Deposits	2,754,579	2,751,019
Borrowings	116,394	46,394
Accrued interest payable	778	879
Fair Value [Member]
Carrying amounts and estimated fair values of financial instruments:
Cash and due from banks, noninterest-bearing	92,633	83,881
Due from banks, interest-bearing	313,141	136,644
Federal funds sold	1,508	2,749
Securities available for sale	124,078	173,041
Securities held to maturity	57,612	56,700
Presold mortgages in process of settlement	5,926	5,422
Total loans, net of allowance	2,330,633	2,352,834
Accrued interest receivable	8,795	9,649
FDIC indemnification asset	28,670	47,032
Bank-owned life insurance	44,685	44,040
Deposits	2,755,180	2,752,375
Borrowings	101,928	34,795
Accrued interest payable	778	879
Level in Fair Value Hierachy [Member]
Carrying amounts and estimated fair values of financial instruments:
Cash and due from banks, noninterest-bearing	1	1
Due from banks, interest-bearing	1	1
Federal funds sold	1	1
Securities available for sale	2	2
Securities held to maturity	2	2
Presold mortgages in process of settlement	1	1
Total loans, net of allowance	3	3
Accrued interest receivable	1	1
FDIC indemnification asset	3	3
Bank-owned life insurance	1	1
Deposits	2	2
Borrowings	2	2
Accrued interest payable	$ 2	$ 2