Fair Value Measurements - (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial assets:
Securities available for sale	$ 526,220	$ 553,584
Trust preferred securities
Financial assets:
Securities available for sale	19,127	19,756
Other debt securities
Financial assets:
Securities available for sale	16,781	17,930
Other equity securities
Financial assets:
Securities available for sale	3,829	3,599
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,203	6,147
Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	283,411	296,359
Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,693	47,185
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	150,511	157,436
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	3,665	5,172
Level 1
Financial assets:
Securities available for sale	0	0
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Level 2
Financial assets:
Securities available for sale	507,093	533,828
Derivative instruments	6,736	3,731
Financial liabilities:
Derivative instruments	5,814	6,293
Level 3
Financial assets:
Securities available for sale	19,127	19,756
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring
Financial assets:
Securities available for sale	526,220	553,584
Derivative instruments	6,736	3,731
Total financial assets	640,979	582,943
Financial liabilities:
Derivative instruments	5,814	6,293
Total financial liabilities	5,814	6,293
Recurring | Interest rate swaps
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	3,532	3,847
Recurring | Interest rate contracts
Financial assets:
Derivative instruments	2,002	2,142
Financial liabilities:
Derivative instruments	2,002	2,143
Recurring | Interest rate lock commitments
Financial assets:
Derivative instruments	3,191	1,584
Financial liabilities:
Derivative instruments	150	0
Recurring | Forward commitments
Financial assets:
Derivative instruments	1,543	5
Financial liabilities:
Derivative instruments	130	303
Recurring | Mortgage loans held for sale
Financial assets:
Derivative instruments	108,023	25,628
Recurring | Trust preferred securities
Financial assets:
Securities available for sale	19,127	19,756
Recurring | Other debt securities
Financial assets:
Securities available for sale	16,781	17,930
Recurring | Other equity securities
Financial assets:
Securities available for sale	3,829	3,599
Recurring | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,203	6,147
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	283,411	296,359
Recurring | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,693	47,185
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	150,511	157,436
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	3,665	5,172
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	507,093	533,828
Derivative instruments	6,736	3,731
Total financial assets	621,852	563,187
Financial liabilities:
Derivative instruments	5,814	6,293
Total financial liabilities	5,814	6,293
Recurring | Level 2 | Interest rate swaps
Financial assets:
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	3,532	3,847
Recurring | Level 2 | Interest rate contracts
Financial assets:
Derivative instruments	2,002	2,142
Financial liabilities:
Derivative instruments	2,002	2,143
Recurring | Level 2 | Interest rate lock commitments
Financial assets:
Derivative instruments	3,191	1,584
Financial liabilities:
Derivative instruments	150	0
Recurring | Level 2 | Forward commitments
Financial assets:
Derivative instruments	1,543	5
Financial liabilities:
Derivative instruments	130	303
Recurring | Level 2 | Mortgage loans held for sale
Financial assets:
Derivative instruments	108,023	25,628
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	16,781	17,930
Recurring | Level 2 | Other equity securities
Financial assets:
Securities available for sale	3,829	3,599
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,203	6,147
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	283,411	296,359
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	42,693	47,185
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	150,511	157,436
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	3,665	5,172
Recurring | Level 3
Financial assets:
Securities available for sale	19,127	19,756
Derivative instruments	0	0
Total financial assets	19,127	19,756
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	19,127	19,756
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