Fair Value Measurements - (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financial assets:
Securities available for sale	$ 653,444	$ 646,805
Trust preferred securities
Financial assets:
Securities available for sale	18,947	19,469
Other debt securities
Financial assets:
Securities available for sale	18,426	19,333
Other equity securities
Financial assets:
Securities available for sale	3,691	4,340
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,217	6,200
Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	363,072	364,540
Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	57,135	59,759
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	180,908	168,060
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,048	5,104
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	634,497	627,336
Derivative instruments	10,448	7,498
Financial liabilities:
Derivative instruments	14,392	7,319
Level 3
Financial assets:
Securities available for sale	18,947	19,469
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring
Financial assets:
Securities available for sale	653,444	646,805
Derivative instruments	10,448	7,498
Total financial assets	962,257	879,557
Financial liabilities:
Derivative instruments	14,392	7,319
Total financial liabilities	14,392	7,319
Recurring | Interest rate swaps
Financial liabilities:
Derivative instruments	6,328	4,266
Recurring | Interest rate contracts
Financial assets:
Derivative instruments	4,181	2,544
Financial liabilities:
Derivative instruments	4,181	2,544
Recurring | Interest rate lock commitments
Financial assets:
Derivative instruments	6,231	4,508
Financial liabilities:
Derivative instruments	95
Recurring | Forward commitments
Financial assets:
Derivative instruments	36	446
Financial liabilities:
Derivative instruments	3,788	509
Recurring | Mortgage loans held for sale
Financial assets:
Derivative instruments	298,365	225,254
Recurring | Trust preferred securities
Financial assets:
Securities available for sale	18,947	19,469
Recurring | Other debt securities
Financial assets:
Securities available for sale	18,426	19,333
Recurring | Other equity securities
Financial assets:
Securities available for sale	3,691	4,340
Recurring | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,217	6,200
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	363,072	364,540
Recurring | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	57,135	59,759
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	180,908	168,060
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,048	5,104
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 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
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	634,497	627,336
Derivative instruments	10,448	7,498
Total financial assets	943,310	860,088
Financial liabilities:
Derivative instruments	14,392	7,319
Total financial liabilities	14,392	7,319
Recurring | Level 2 | Interest rate swaps
Financial liabilities:
Derivative instruments	6,328	4,266
Recurring | Level 2 | Interest rate contracts
Financial assets:
Derivative instruments	4,181	2,544
Financial liabilities:
Derivative instruments	4,181	2,544
Recurring | Level 2 | Interest rate lock commitments
Financial assets:
Derivative instruments	6,231	4,508
Financial liabilities:
Derivative instruments	95
Recurring | Level 2 | Forward commitments
Financial assets:
Derivative instruments	36	446
Financial liabilities:
Derivative instruments	3,788	509
Recurring | Level 2 | Mortgage loans held for sale
Financial assets:
Derivative instruments	298,365	225,254
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	18,426	19,333
Recurring | Level 2 | Other equity securities
Financial assets:
Securities available for sale	3,691	4,340
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	6,217	6,200
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	363,072	364,540
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	57,135	59,759
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	180,908	168,060
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	5,048	5,104
Recurring | Level 3
Financial assets:
Securities available for sale	18,947	19,469
Derivative instruments	0	0
Total financial assets	18,947	19,469
Financial liabilities:
Derivative instruments	0	0
Total financial liabilities	0	0
Recurring | Level 3 | Interest rate swaps
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
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	18,947	19,469
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