Securities (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($) Security	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Security	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) Security
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 595,886		$ 595,886		$ 585,851
Unrealized Gains	5,991		5,991		3,152
Unrealized Losses	2,122		2,122		3,519
Fair Value	599,755		599,755		585,484
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	89,605		89,605		272,152
Less Than Twelve Months, Unrealized Losses	477		477		1,744
Twelve Months or More, Fair Value	50,161		50,161		55,638
Twelve Months or More, Unrealized Losses	1,645		1,645		1,775
Total, Fair Value	139,766		139,766		327,790
Total, Unrealized Losses	2,122		2,122		3,519
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	2,739		2,739
Amortized cost	2,525		2,525
Non-credit unrealized loss	0		0
Unrealized gain	214		214
Cumulative credit related OTTI	1,594		1,594
OTTI changes recorded in earnings	0	$ 0	0	$ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of period	1,844	1,844	1,844	1,844	1,844
Additions to credit losses on securities for which no previous OTTI was recognized	0	0	0	0
Increases to credit losses on securities for which OTTI was previously recognized	0	0	0	0
Balance at end of period	1,844	1,844	1,844	1,844	1,844
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Maturing within one year	27,502		27,502
Maturing after one year but within five years	79,845		79,845
Maturing after five years but within ten years	66,708		66,708
Maturing after ten years	67,487		67,487
Available-for-sale securities, debt maturities, amortized cost basis	241,542		241,542
U.S. agency residential mortgage-backed	180,415		180,415
U.S. agency commercial mortgage-backed	7,832		7,832
Private label residential mortgage-backed	26,202		26,202
Other asset backed	139,895		139,895
Total	595,886		595,886
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Maturing within one year	27,533		27,533
Maturing after one year but within five years	80,614		80,614
Maturing after five years but within ten years	67,656		67,656
Maturing after ten years	67,801		67,801
Total available-for-sale securities fair value	243,604		243,604
U.S. agency residential mortgage-backed	182,063		182,063
U.S. agency commercial mortgage-backed	7,996		7,996
Private label residential mortgage-backed	26,246		26,246
Other asset backed	139,846		139,846
Total	599,755		599,755
Gain and losses realized on sale of securities available for sale [Abstract]
Proceeds			55,362	11,786
Realized gains			336	75
Realized losses			53	0
Trading securities, realized gains (losses)			64	(23)
Credit related OTTI recognized in earnings	0	0
U.S. Agency [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	31,165		31,165		47,283
Unrealized Gains	552		552		309
Unrealized Losses	38		38		80
Fair Value	31,679		31,679		47,512
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	3,432		3,432		12,164
Less Than Twelve Months, Unrealized Losses	7		7		47
Twelve Months or More, Fair Value	6,168		6,168		6,746
Twelve Months or More, Unrealized Losses	31		31		33
Total, Fair Value	9,600		9,600		18,910
Total, Unrealized Losses	$ 38		$ 38		80
Number of securities with market fair value less than amortized cost | Security	19		19
U.S. Agency Residential Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 180,415		$ 180,415		195,055
Unrealized Gains	1,783		1,783		1,584
Unrealized Losses	135		135		583
Fair Value	182,063		182,063		196,056
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	23,927		23,927		57,538
Less Than Twelve Months, Unrealized Losses	53		53		316
Twelve Months or More, Fair Value	13,743		13,743		23,340
Twelve Months or More, Unrealized Losses	82		82		267
Total, Fair Value	37,670		37,670		80,878
Total, Unrealized Losses	$ 135		$ 135		583
Number of securities with market fair value less than amortized cost | Security	56		56
U.S. Agency Commercial Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 7,832		$ 7,832		34,017
Unrealized Gains	167		167		94
Unrealized Losses	3		3		83
Fair Value	7,996		7,996		34,028
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	548		548		16,747
Less Than Twelve Months, Unrealized Losses	2		2		60
Twelve Months or More, Fair Value	199		199		2,247
Twelve Months or More, Unrealized Losses	1		1		23
Total, Fair Value	747		747		18,994
Total, Unrealized Losses	$ 3		$ 3		83
Number of securities with market fair value less than amortized cost | Security	4		4
Private Label Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 26,202		$ 26,202		5,061
Unrealized Gains	343		343		161
Unrealized Losses	299		299		319
Fair Value	26,246		26,246		4,903
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	2,566		2,566		0
Less Than Twelve Months, Unrealized Losses	8		8		0
Twelve Months or More, Fair Value	1,521		1,521		3,393
Twelve Months or More, Unrealized Losses	291		291		319
Total, Fair Value	4,087		4,087		3,393
Total, Unrealized Losses	$ 299		$ 299		$ 319
Number of securities with market fair value less than amortized cost | Security	9		9
Number of securities purchased prior to 2016 | Security					4
Number of securities with impairment in excess of ten percent | Security	2		2
Percentage of excess impairment on securities	10.00%		10.00%
Number of securities with impairment for more than 12 months | Security	3		3
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Number of private label mortgage backed securities complete recovery of cost basis | Security	4		4
Number of private label mortgage backed securities currently with OTTI unrealized gains | Security	3		3
Number of private label mortgage backed securities with OTTI unrealized loss less than previous OTTI credit | Security	3		3
Senior Security [Member]
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	$ 1,469		$ 1,469
Amortized cost	1,396		1,396
Non-credit unrealized loss	0		0
Unrealized gain	73		73
Cumulative credit related OTTI	757		757
OTTI changes recorded in earnings	0	0	0	0
Super Senior Security [Member]
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	1,194		1,194
Amortized cost	1,129		1,129
Non-credit unrealized loss	0		0
Unrealized gain	65		65
Cumulative credit related OTTI	457		457
OTTI changes recorded in earnings	0	0	0	0
Senior Support Security [Member]
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	76		76
Amortized cost	0		0
Non-credit unrealized loss	0		0
Unrealized gain	76		76
Cumulative credit related OTTI	380		380
OTTI changes recorded in earnings	0	$ 0	0	$ 0
Other Asset Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	139,895		139,895		$ 117,431
Unrealized Gains	298		298		54
Unrealized Losses	347		347		581
Fair Value	139,846		139,846		116,904
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	42,783		42,783		102,660
Less Than Twelve Months, Unrealized Losses	161		161		434
Twelve Months or More, Fair Value	12,079		12,079		5,189
Twelve Months or More, Unrealized Losses	186		186		147
Total, Fair Value	54,862		54,862		107,849
Total, Unrealized Losses	$ 347		$ 347		581
Number of securities with market fair value less than amortized cost | Security	88		88
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 156,663		$ 156,663		145,193
Unrealized Gains	2,311		2,311		941
Unrealized Losses	633		633		1,150
Fair Value	158,341		158,341		144,984
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	12,316		12,316		52,493
Less Than Twelve Months, Unrealized Losses	227		227		597
Twelve Months or More, Fair Value	10,176		10,176		12,240
Twelve Months or More, Unrealized Losses	406		406		553
Total, Fair Value	22,492		22,492		64,733
Total, Unrealized Losses	$ 633		$ 633		1,150
Number of securities with market fair value less than amortized cost | Security	52		52
Number of securities with impairment in excess of ten percent | Security	1		1
Percentage of excess impairment on securities	10.00%		10.00%
Corporate [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 49,150		$ 49,150		38,895
Unrealized Gains	521		521		9
Unrealized Losses	144		144		290
Fair Value	49,527		49,527		38,614
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	4,033		4,033		30,550
Less Than Twelve Months, Unrealized Losses	19		19		290
Twelve Months or More, Fair Value	3,878		3,878		0
Twelve Months or More, Unrealized Losses	125		125		0
Total, Fair Value	7,911		7,911		30,550
Total, Unrealized Losses	$ 144		$ 144		290
Number of securities with market fair value less than amortized cost | Security	8		8
Trust Preferred [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	$ 2,920		$ 2,920		2,916
Unrealized Gains	0		0		0
Unrealized Losses	523		523		433
Fair Value	2,397		2,397		2,483
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	0		0		0
Less Than Twelve Months, Unrealized Losses	0		0		0
Twelve Months or More, Fair Value	2,397		2,397		2,483
Twelve Months or More, Unrealized Losses	523		523		433
Total, Fair Value	2,397		2,397		2,483
Total, Unrealized Losses	$ 523		$ 523		433
Number of securities with market fair value less than amortized cost | Security	3		3
Number of securities rated as investment grade | Security	1		1
Number of securities rated as below investment grade | Security	1		1
Number of major credit rating agencies | Security	2		2
Number of securities non-rated | Security	1		1
Non-rated trust preferred securities, amortized cost	$ 1,000		$ 1,000
Non-rated trust preferred securities, fair value	700		700
Rated Issues [Member]
Trust preferred securities [Abstract]
Fair Value	1,650		1,650		1,690
Net Unrealized Loss			(270)		(226)
Unrated Issues [Member]
Trust preferred securities [Abstract]
Fair Value	747		747		793
Net Unrealized Loss			(253)		$ (207)
Foreign Government [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost	1,644		1,644
Unrealized Gains	16		16
Unrealized Losses	0		0
Fair Value	$ 1,660		$ 1,660