Fair Value Measurements - (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial assets:
Securities available for sale	$ 674,447	$ 646,805
Trust preferred securities
Financial assets:
Securities available for sale	18,179	19,469
Other debt securities
Financial assets:
Securities available for sale	18,161	19,333
Other equity securities
Financial assets:
Securities available for sale	0	4,340
Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,220	6,200
Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	408,304	364,540
Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	54,898	59,759
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	168,047	168,060
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,638	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	656,268	627,336
Derivative instruments	10,973	7,498
Financial liabilities:
Derivative instruments	17,118	7,319
Level 3
Financial assets:
Securities available for sale	18,179	19,469
Derivative instruments	0	0
Financial liabilities:
Derivative instruments	0	0
Recurring
Financial assets:
Securities available for sale	674,447	646,805
Derivative instruments	10,973	7,498
Total financial assets	962,202	879,557
Financial liabilities:
Derivative instruments	17,118	7,319
Total financial liabilities	17,118	7,319
Recurring | Interest rate swaps
Financial liabilities:
Derivative instruments	7,032	4,266
Recurring | Interest rate contracts
Financial assets:
Derivative instruments	5,403	2,544
Financial liabilities:
Derivative instruments	5,403	2,544
Recurring | Interest rate lock commitments
Financial assets:
Derivative instruments	5,570	4,508
Financial liabilities:
Derivative instruments	1
Recurring | Forward commitments
Financial assets:
Derivative instruments	0	446
Financial liabilities:
Derivative instruments	4,682	509
Recurring | Mortgage loans held for sale
Financial assets:
Derivative instruments	276,782	225,254
Recurring | Trust preferred securities
Financial assets:
Securities available for sale	18,179	19,469
Recurring | Other debt securities
Financial assets:
Securities available for sale	18,161	19,333
Recurring | Other equity securities
Financial assets:
Securities available for sale	0	4,340
Recurring | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,220	6,200
Recurring | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	408,304	364,540
Recurring | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	54,898	59,759
Recurring | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	168,047	168,060
Recurring | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,638	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	656,268	627,336
Derivative instruments	10,973	7,498
Total financial assets	944,023	860,088
Financial liabilities:
Derivative instruments	17,118	7,319
Total financial liabilities	17,118	7,319
Recurring | Level 2 | Interest rate swaps
Financial liabilities:
Derivative instruments	7,032	4,266
Recurring | Level 2 | Interest rate contracts
Financial assets:
Derivative instruments	5,403	2,544
Financial liabilities:
Derivative instruments	5,403	2,544
Recurring | Level 2 | Interest rate lock commitments
Financial assets:
Derivative instruments	5,570	4,508
Financial liabilities:
Derivative instruments	1
Recurring | Level 2 | Forward commitments
Financial assets:
Derivative instruments	0	446
Financial liabilities:
Derivative instruments	4,682	509
Recurring | Level 2 | Mortgage loans held for sale
Financial assets:
Derivative instruments	276,782	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	18,161	19,333
Recurring | Level 2 | Other equity securities
Financial assets:
Securities available for sale	0	4,340
Recurring | Level 2 | Obligations of other U.S. Government agencies and corporations
Financial assets:
Securities available for sale	2,220	6,200
Recurring | Level 2 | Government agency mortgage backed securities | Residential mortgage backed securities:
Financial assets:
Securities available for sale	408,304	364,540
Recurring | Level 2 | Government agency mortgage backed securities | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	54,898	59,759
Recurring | Level 2 | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Financial assets:
Securities available for sale	168,047	168,060
Recurring | Level 2 | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Financial assets:
Securities available for sale	4,638	5,104
Recurring | Level 3
Financial assets:
Securities available for sale	18,179	19,469
Derivative instruments	0	0
Total financial assets	18,179	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	18,179	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