Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financial assets:
Securities available for sale	$ 545,623	$ 501,254
Derivative instruments	0	208
Trust preferred securities
Financial assets:
Securities available for sale	19,573	17,671
Other debt securities
Financial assets:
Securities available for sale	18,389	19,554
Other equity securities
Financial assets:
Securities available for sale	3,479	4,317
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,113	6,068
Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	290,684	259,992
Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	47,087	42,041
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	154,972	146,545
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,326	5,066
Recurring
Financial assets:
Securities available for sale	545,623	501,254
Derivative instruments	2,742	2,819
Total financial assets	578,816	537,513
Financial liabilities:
Derivative instruments	3,792	3,316
Total financial liabilities	3,792	3,316
Recurring | Interest rate swaps
Financial assets:
Derivative instruments	0	208
Financial liabilities:
Derivative instruments	2,472	1,428
Recurring | Interest rate contracts
Financial assets:
Derivative instruments	1,083	1,812
Financial liabilities:
Derivative instruments	1,083	1,812
Recurring | Interest rate lock commitments
Financial assets:
Derivative instruments	1,630	464
Financial liabilities:
Derivative instruments	0	52
Recurring | Forward commitments
Financial assets:
Derivative instruments	29	335
Financial liabilities:
Derivative instruments	237	24
Recurring | Mortgage loans held for sale
Financial assets:
Derivative instruments	30,451	33,440
Recurring | Trust preferred securities
Financial assets:
Securities available for sale	19,573	17,671
Recurring | Other debt securities
Financial assets:
Securities available for sale	18,389	19,554
Recurring | Other equity securities
Financial assets:
Securities available for sale	3,479	4,317
Recurring | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,113	6,068
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	290,684	259,992
Recurring | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	47,087	42,041
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	154,972	146,545
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,326	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 swaps
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	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 | Forward 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 | 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	526,050	483,583
Derivative instruments	2,742	2,819
Total financial assets	559,243	519,842
Financial liabilities:
Derivative instruments	3,792	3,316
Total financial liabilities	3,792	3,316
Recurring | Level 2 | Interest rate swaps
Financial assets:
Derivative instruments	0	208
Financial liabilities:
Derivative instruments	2,472	1,428
Recurring | Level 2 | Interest rate contracts
Financial assets:
Derivative instruments	1,083	1,812
Financial liabilities:
Derivative instruments	1,083	1,812
Recurring | Level 2 | Interest rate lock commitments
Financial assets:
Derivative instruments	1,630	464
Financial liabilities:
Derivative instruments	0	52
Recurring | Level 2 | Forward commitments
Financial assets:
Derivative instruments	29	335
Financial liabilities:
Derivative instruments	237	24
Recurring | Level 2 | Mortgage loans held for sale
Financial assets:
Derivative instruments	30,451	33,440
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	18,389	19,554
Recurring | Level 2 | Other equity securities
Financial assets:
Securities available for sale	3,479	4,317
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,113	6,068
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	290,684	259,992
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	47,087	42,041
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	154,972	146,545
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,326	5,066
Recurring | Level 3
Financial assets:
Securities available for sale	19,573	17,671
Derivative instruments	0	0
Total financial assets	19,573	17,671
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring | Level 3 | Interest rate swaps
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	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 | Forward 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 | Trust preferred securities
Financial assets:
Securities available for sale	19,573	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