Securities (Details) (USD $)	3 Months Ended											3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended											3 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 U.S. Agency [Member] Security	Dec. 31, 2013 U.S. Agency [Member]	Mar. 31, 2014 U.S. Agency Residential Mortgage-Backed [Member] Security	Dec. 31, 2013 U.S. Agency Residential Mortgage-Backed [Member]	Mar. 31, 2014 U.S. Agency Commercial Mortgage-Backed [Member] Security	Mar. 31, 2014 Private Label Residential Mortgage-Backed [Member] Transaction Bond Security	Dec. 31, 2013 Private Label Residential Mortgage-Backed [Member]	Mar. 31, 2013 Private Label Residential Mortgage-Backed [Member] Security	Mar. 31, 2014 Jumbo [Member]	Dec. 31, 2013 Jumbo [Member]	Mar. 31, 2014 Alt - A [Member]	Dec. 31, 2013 Alt - A [Member]	Mar. 31, 2014 Seasoned ARM Transactions [Member]	Mar. 31, 2014 Senior Security [Member]	Mar. 31, 2013 Senior Security [Member]	Mar. 31, 2014 Super Senior Security [Member]	Mar. 31, 2013 Super Senior Security [Member]	Mar. 31, 2014 Senior Support Security [Member]	Mar. 31, 2013 Senior Support Security [Member]	Mar. 31, 2014 Other Asset-backed [Member] Security	Dec. 31, 2013 Other Asset-backed [Member]	Mar. 31, 2014 Obligations of States and Political Subdivisions [Member] Security	Dec. 31, 2013 Obligations of States and Political Subdivisions [Member]	Mar. 31, 2014 Trust Preferred [Member] CreditRatingAgency Security	Dec. 31, 2013 Trust Preferred [Member]	Mar. 31, 2014 Rated Issues [Member]	Dec. 31, 2013 Rated Issues [Member]	Mar. 31, 2014 Unrated Issues - No OTTI [Member]	Dec. 31, 2013 Unrated Issues - No OTTI [Member]	Mar. 31, 2014 Corporate [Member] Security	Dec. 31, 2013 Corporate [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 525,491,000		$ 467,406,000	$ 48,024,000	$ 32,106,000	$ 235,601,000	$ 202,649,000	$ 12,640,000	$ 7,052,000	$ 7,294,000													$ 43,425,000	$ 45,369,000	$ 156,342,000	$ 157,966,000	$ 2,904,000	$ 2,902,000					$ 19,503,000	$ 19,120,000
Unrealized gains	2,621,000		2,048,000	18,000	44,000	1,573,000	1,343,000	27,000	137,000	112,000													45,000	10,000	738,000	496,000	0	0					83,000	43,000
Unrealized losses	5,177,000		6,973,000	388,000	342,000	429,000	532,000	27,000	546,000	618,000													156,000	194,000	3,150,000	4,784,000	460,000	477,000					21,000	26,000
Fair Value	522,935,000		462,481,000	47,654,000	31,808,000	236,745,000	203,460,000	12,640,000	6,643,000	6,788,000													43,314,000	45,185,000	153,930,000	153,678,000	2,444,000	2,425,000					19,565,000	19,137,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	198,986,000		240,287,000	36,853,000	16,715,000	52,705,000	78,256,000	4,318,000	167,000	407,000													28,442,000	33,862,000	70,657,000	103,942,000	0	0					5,844,000	7,105,000
Less Than Twelve Months, Unrealized Losses	3,515,000		5,745,000	388,000	342,000	315,000	532,000	27,000	1,000	6,000													156,000	194,000	2,607,000	4,645,000	0	0					21,000	26,000
Twelve Months or More, Fair Value	41,692,000		11,832,000	0	0	23,242,000	0	0	4,485,000	4,602,000													0	0	11,521,000	4,805,000	2,444,000	2,425,000					0	0
Twelve Months or More, Unrealized Losses	1,662,000		1,228,000	0	0	114,000	0	0	545,000	612,000													0	0	543,000	139,000	460,000	477,000					0	0
Total, Fair value	240,678,000		252,119,000	36,853,000	16,715,000	75,947,000	78,256,000	4,318,000	4,652,000	5,009,000													28,442,000	33,862,000	82,178,000	108,747,000	2,444,000	2,425,000					5,844,000	7,105,000
Total, Unrealized Losses	5,177,000		6,973,000	388,000	342,000	429,000	532,000	27,000	546,000	618,000													156,000	194,000	3,150,000	4,784,000	460,000	477,000					21,000	26,000
Private Label Residential Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	4,183,000																2,426,000		1,712,000		45,000
Amortized cost	4,319,000																2,697,000		1,622,000		0
Non-credit unrealized loss	271,000																271,000		0		0
Unrealized gain	135,000																0		90,000		45,000
Cumulative credit related OTTI	1,585,000																748,000		457,000		380,000
OTTI changes recorded in earnings	0	0															0	0	0	0	0	0
Number of securities with market fair value less than amortized cost				21		33		7	5														20		96		3						8
Number of securities rated as investment grade									2																		1
Number of securities rated as below investment grade									2																		1
Number of securities that are split rated									1
Number of major credit rating agencies rating securities with fair value less than amortized cost																											2
Number of securities not rated																											1
Number of bonds with impairment in excess of ten percent									3
Percentage of excess impairment on bonds (in hundredths)									10.00%
Number of bonds with impairment for more than 12 months									4
Mortgage Backed Securities Issued By Private Enterprises [Abstract]
Fair Value												4,563,000	4,687,000	2,080,000	2,101,000
Net Unrealized Loss												(371,000)	(441,000)	(38,000)	(65,000)
Percentage of credit spread widening (in hundredths)												69.00%		31.00%
Normalized prepayment rate, minimum (in hundredths)																10.00%
Normalized prepayment rate, maximum (in hundredths)																15.00%
Number of transactions with fixed rate collateral									1
Projected period of decline in loan defaults	3 years
Expected loss severity period	12 months
The number of private label mortgage backed securities currently below investment grade with OTTI									3
Number of private label mortgage backed securities currently below investment grade with OTTI unrealized gains									2
Number of private label mortgage backed securities currently below investment grade with OTTI unrealized loss									1		3
Number of private label mortgage backed securities currently below investment grade with OTTI unrealized loss less than previous OTTI credit									2
Number of impaired municipal securities rated by major agency																											3
Non-rated securities, amortized cost																											1,000,000
Fair value of non-rated trust preferred securities																											800,000
Trust preferred securities [Abstract]
Fair Value																													1,619,000	1,600,000	825,000	825,000
Net Unrealized Loss																													(285,000)	(302,000)	(175,000)	(175,000)
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Maturing within one year	15,809,000
Maturing after one year but within five years	86,513,000
Maturing after five years but within ten years	50,721,000
Maturing after ten years	73,730,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	226,773,000
U.S. agency residential mortgage-backed	235,601,000
U.S. agency commercial mortgage-backed	12,640,000
Private label residential mortgage-backed	7,052,000
Other asset backed	43,425,000
Total	525,491,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Maturing within one year	15,837,000
Maturing after one year but within five years	86,741,000
Maturing after five years but within ten years	50,491,000
Maturing after ten years	70,524,000
Available-for-sale Securities fair value total	223,593,000
U.S. agency residential mortgage backed	236,745,000
U.S. agency commercial mortgage-backed	12,640,000
Private label residential mortgage-backed	6,643,000
Other asset backed	43,314,000
Total	522,935,000
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of year	1,835,000	1,809,000
Additions to credit losses on securities for which no previous OTTI was recognized	0	0
Increases to credit losses on securities for which OTTI was previously recognized	0	0
Balance at end period	1,835,000	1,809,000
Gain and losses realized on sale of securities available for sale [Abstract]
Proceeds	0	1,800,000
Realized Gains	0	0
Losses	0	7,000
Trading Securities, Realized Gain (Loss)	$ 112,000	$ 91,000