Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financial assets:
Securities available for sale	$ 564,278	$ 501,254
Trust preferred securities
Financial assets:
Securities available for sale	19,378	17,671
Other debt securities
Financial assets:
Securities available for sale	19,098	19,554
Other equity securities
Financial assets:
Securities available for sale	4,470	4,317
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,115	6,068
Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	302,982	259,992
Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,059	42,041
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	165,920	146,545
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,256	5,066
Recurring
Financial assets:
Securities available for sale	564,278	501,254
Derivative instruments	2,343	2,819
Total financial assets	595,054	537,513
Financial liabilities:
Derivative instruments	3,276	3,316
Total financial liabilities	3,276	3,316
Recurring | Interest rate contracts
Financial assets:
Derivative instruments	1,278	1,812
Financial liabilities:
Derivative instruments	1,278	1,812
Recurring | Interest rate lock commitments
Financial assets:
Derivative instruments	967	464
Financial liabilities:
Derivative instruments	12	52
Recurring | Mortgage loans held for sale
Financial assets:
Derivative instruments	28,433	33,440
Recurring | Interest rate swaps
Financial assets:
Derivative instruments		208
Financial liabilities:
Derivative instruments	1,899	1,428
Recurring | Forward commitments
Financial assets:
Derivative instruments	98	335
Financial liabilities:
Derivative instruments	87	24
Recurring | Trust preferred securities
Financial assets:
Securities available for sale	19,378	17,671
Recurring | Other debt securities
Financial assets:
Securities available for sale	19,098	19,554
Recurring | Other equity securities
Financial assets:
Securities available for sale	4,470	4,317
Recurring | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,115	6,068
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	302,982	259,992
Recurring | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,059	42,041
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	165,920	146,545
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,256	5,066
Recurring | Level 1
Financial assets:
Securities available for sale	0	0
Derivative instruments	0	0
Total financial assets	0	0
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring | Level 1 | Interest rate contracts
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 1 | Interest rate lock commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 1 | Mortgage loans held for sale
Financial assets:
Derivative instruments	0	0
Recurring | Level 1 | Interest rate swaps
Financial assets:
Derivative instruments		0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 1 | Forward commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 1 | Trust preferred securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Other debt securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Other equity securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 1 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 2
Financial assets:
Securities available for sale	544,900	483,583
Derivative instruments	2,343	2,819
Total financial assets	575,676	519,842
Financial liabilities:
Derivative instruments	3,276	3,316
Total financial liabilities	3,276	3,316
Recurring | Level 2 | Interest rate contracts
Financial assets:
Derivative instruments	1,278	1,812
Financial liabilities:
Derivative instruments	1,278	1,812
Recurring | Level 2 | Interest rate lock commitments
Financial assets:
Derivative instruments	967	464
Financial liabilities:
Derivative instruments	12	52
Recurring | Level 2 | Mortgage loans held for sale
Financial assets:
Derivative instruments	28,433	33,440
Recurring | Level 2 | Interest rate swaps
Financial assets:
Derivative instruments		208
Financial liabilities:
Derivative instruments	1,899	1,428
Recurring | Level 2 | Forward commitments
Financial assets:
Derivative instruments	98	335
Financial liabilities:
Derivative instruments	87	24
Recurring | Level 2 | Trust preferred securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 2 | Other debt securities
Financial assets:
Securities available for sale	19,098	19,554
Recurring | Level 2 | Other equity securities
Financial assets:
Securities available for sale	4,470	4,317
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,115	6,068
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	302,982	259,992
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,059	42,041
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	165,920	146,545
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,256	5,066
Recurring | Level 3
Financial assets:
Securities available for sale	19,378	17,671
Derivative instruments	0	0
Total financial assets	19,378	17,671
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring | Level 3 | Interest rate contracts
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 3 | Interest rate lock commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 3 | Mortgage loans held for sale
Financial assets:
Derivative instruments	0	0
Recurring | Level 3 | Interest rate swaps
Financial assets:
Derivative instruments		0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 3 | Forward commitments
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring | Level 3 | Trust preferred securities
Financial assets:
Securities available for sale	19,378	17,671
Recurring | Level 3 | Other debt securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Other equity securities
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	0	0
Recurring | Level 3 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	$ 0	$ 0