Securities (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2015 USD ($) Security CreditRatingAgency Bond	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Security CreditRatingAgency Bond	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2013 Security
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 557,068		$ 557,068		$ 532,930
Unrealized Gains		3,217		3,217		3,317
Unrealized Losses		2,590		2,590		3,069
Fair Value		557,695		557,695		533,178
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		144,940		144,940		163,665
Less Than Twelve Months, Unrealized Losses		702		702		909
Twelve Months or More, Fair Value		58,095		58,095		69,122
Twelve Months or More, Unrealized Losses		1,888		1,888		2,160
Total, Fair Value		203,035		203,035		232,787
Total, Unrealized Losses		2,590		2,590		3,069
Private Label Residential Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value		3,397		3,397
Amortized cost		3,263		3,263
Non-credit unrealized loss		54		54
Unrealized gain		188		188
Cumulative credit related OTTI		1,594		1,594
OTTI changes recorded in earnings		0	$ 0	0	$ 0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Maturing within one year		24,875		24,875
Maturing after one year but within five years		59,355		59,355
Maturing after five years but within ten years		34,747		34,747
Maturing after ten years		77,593		77,593
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis		196,570		196,570
U.S. agency residential mortgage-backed		216,466		216,466
U.S. agency commercial mortgage-backed		30,074		30,074
Private label residential mortgage-backed		5,644		5,644
Other asset backed		108,314		108,314
Total		557,068		557,068
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Maturing within one year		24,904		24,904
Maturing after one year but within five years		59,631		59,631
Maturing after five years but within ten years		34,991		34,991
Maturing after ten years		76,257		76,257
Available-for-sale Securities fair value total		195,783		195,783
U.S. agency residential mortgage backed		217,980		217,980
U.S. agency commercial mortgage-backed		30,160		30,160
Private label residential mortgage-backed		5,460		5,460
Other asset backed		108,312		108,312
Total		557,695		557,695
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of year		1,844	1,835	1,844	1,835	1,835
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 year		$ 1,844	1,835	1,844	1,835	1,844
Gain and losses realized on sale of securities available for sale [Abstract]
Proceeds				11,786	5,126
Realized Gains	[1]			75	2
Realized Losses				0	0
Trading securities, realized gains (losses)				$ (23)	111
Unrealized gain related to U.S. Treasury short position					53
U.S. Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		16		16
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 36,068		$ 36,068		34,936
Unrealized Gains		231		231		133
Unrealized Losses		28		28		63
Fair Value		36,271		36,271		35,006
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		9,564		9,564		12,851
Less Than Twelve Months, Unrealized Losses		25		25		58
Twelve Months or More, Fair Value		760		760		606
Twelve Months or More, Unrealized Losses		3		3		5
Total, Fair Value		10,324		10,324		13,457
Total, Unrealized Losses		$ 28		$ 28		63
U.S. Agency Residential Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		74		74
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 216,466		$ 216,466		256,387
Unrealized Gains		1,868		1,868		1,838
Unrealized Losses		354		354		667
Fair Value		217,980		217,980		257,558
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		48,277		48,277		89,547
Less Than Twelve Months, Unrealized Losses		221		221		531
Twelve Months or More, Fair Value		14,933		14,933		15,793
Twelve Months or More, Unrealized Losses		133		133		136
Total, Fair Value		63,210		63,210		105,340
Total, Unrealized Losses		$ 354		$ 354		667
U.S. Agency Commercial Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		8		8
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 30,074		$ 30,074		33,779
Unrealized Gains		113		113		68
Unrealized Losses		27		27		119
Fair Value		30,160		30,160		33,728
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		10,921		10,921		21,325
Less Than Twelve Months, Unrealized Losses		21		21		119
Twelve Months or More, Fair Value		1,342		1,342		0
Twelve Months or More, Unrealized Losses		6		6		0
Total, Fair Value		12,263		12,263		21,325
Total, Unrealized Losses		$ 27		$ 27		119
Private Label Residential Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		5		5
Number of securities | Security		5		5
Number of securities rated as investment grade | Security		2		2
Number of securities rated as below investment grade | Security		2		2
Number of bonds with impairment in excess of ten percent | Bond		2		2
Percentage of excess impairment on bonds (in hundredths)		10.00%		10.00%
Number of bonds with impairment for more than 12 months | Bond		4		4
Number of private label mortgage backed securities with OTTI that are forecasted to have complete recovery of cost basis | Security		4		4
Number of private label mortgage backed securities currently below investment grade with OTTI unrealized gains | Security		2		2
Number of private label mortgage backed securities currently below investment grade with OTTI unrealized loss | Security		1		1			3
Number of private label mortgage backed securities with OTTI unrealized loss less than previous OTTI credit | Security		2		2
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 5,644		$ 5,644		6,216
Unrealized Gains		187		187		187
Unrealized Losses		371		371		390
Fair Value		5,460		5,460		6,013
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		193		193		208
Less Than Twelve Months, Unrealized Losses		1		1		1
Twelve Months or More, Fair Value		3,603		3,603		4,013
Twelve Months or More, Unrealized Losses		370		370		389
Total, Fair Value		3,796		3,796		4,221
Total, Unrealized Losses		371		371		390
Senior Security [Member]
Private Label Residential Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value		1,835		1,835
Amortized cost		1,889		1,889
Non-credit unrealized loss		54		54
Unrealized gain		0		0
Cumulative credit related OTTI		757		757
OTTI changes recorded in earnings		0	0	0	0
Super Senior Security [Member]
Private Label Residential Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value		1,466		1,466
Amortized cost		1,374		1,374
Non-credit unrealized loss		0		0
Unrealized gain		92		92
Cumulative credit related OTTI		457		457
OTTI changes recorded in earnings		0	0	0	0
Senior Support Security [Member]
Private Label Residential Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value		96		96
Amortized cost		0		0
Non-credit unrealized loss		0		0
Unrealized gain		96		96
Cumulative credit related OTTI		380		380
OTTI changes recorded in earnings		$ 0	$ 0	$ 0	$ 0
Other Asset Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		47		47
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 108,314		$ 108,314		32,314
Unrealized Gains		115		115		77
Unrealized Losses		117		117		38
Fair Value		108,312		108,312		32,353
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		35,787		35,787		2,960
Less Than Twelve Months, Unrealized Losses		69		69		15
Twelve Months or More, Fair Value		5,691		5,691		8,729
Twelve Months or More, Unrealized Losses		48		48		23
Total, Fair Value		41,478		41,478		11,689
Total, Unrealized Losses		$ 117		$ 117		38
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		90		90
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 135,007		$ 135,007		143,698
Unrealized Gains		640		640		961
Unrealized Losses		1,284		1,284		1,244
Fair Value		134,363		134,363		143,415
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		35,965		35,965		28,114
Less Than Twelve Months, Unrealized Losses		355		355		106
Twelve Months or More, Fair Value		29,252		29,252		37,540
Twelve Months or More, Unrealized Losses		929		929		1,138
Total, Fair Value		65,217		65,217		65,654
Total, Unrealized Losses		$ 1,284		$ 1,284		1,244
Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with market fair value less than amortized cost | Security		4		4
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		$ 22,582		$ 22,582		22,690
Unrealized Gains		63		63		53
Unrealized Losses		10		10		79
Fair Value		22,635		22,635		22,664
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value		4,233		4,233		8,660
Less Than Twelve Months, Unrealized Losses		10		10		79
Twelve Months or More, Fair Value		0		0		0
Twelve Months or More, Unrealized Losses		0		0		0
Total, Fair Value		4,233		4,233		8,660
Total, Unrealized Losses		$ 10		$ 10		79
Trust Preferred [Member]
Schedule of Available-for-sale Securities [Line Items]
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 | CreditRatingAgency		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		800		800
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized Cost		2,913		2,913		2,910
Unrealized Gains		0		0		0
Unrealized Losses		399		399		469
Fair Value		2,514		2,514		2,441
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		2,514		2,514		2,441
Twelve Months or More, Unrealized Losses		399		399		469
Total, Fair Value		2,514		2,514		2,441
Total, Unrealized Losses		399		399		469
Rated Issues [Member]
Trust preferred securities [Abstract]
Fair Value		1,700		1,700		1,643
Net Unrealized Loss				(213)		(267)
Unrated Issues [Member]
Trust preferred securities [Abstract]
Fair Value		$ 814		814		798
Net Unrealized Loss				$ (186)		$ (202)

[1] Gains in 2014 exclude $0.053 million of unrealized gain related to a U.S. Treasury short position.