Investments Maturities of Available for sale Securities by Type (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 694,832,000		$ 690,556,000
Available-for-sale Securities	691,729,000		699,300,000
Weighted Average Remaining Maturity, Available for Sale Securities	9.7 years		12.1 years
Available for Sale Securities Callable Before Maturity	169,000,000		161,900,000
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	0	[1]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	0	[1]
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	0.00%	[1]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	1,144,000	[1]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	1,117,000	[1]
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	2.68%	[1]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	1,156,000	[1]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	1,171,000	[1]
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	3.11%	[1]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	0	[1]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0	[1]
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	0.00%	[1]
Available-for-sale Securities, Amortized Cost Basis	2,300,000		2,781,000
Available-for-sale Securities	2,288,000		2,753,000
Available for sale Securities, Weighted Average Yield	2.90%
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	438,000	[1]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	450,000	[1]
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	4.73%	[1]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	213,345,000	[1]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	212,755,000	[1]
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	0.83%	[1]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	14,887,000	[1]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	14,735,000	[1]
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	1.76%	[1]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	0	[1]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0	[1]
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	0.00%	[1]
Available-for-sale Securities, Amortized Cost Basis	228,670,000		154,058,000
Available-for-sale Securities	227,940,000		155,002,000
Available for sale Securities, Weighted Average Yield	0.90%
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	46,187,000	[1]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	46,322,000	[1]
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	1.97%	[1],[2]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	92,491,000	[1]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	93,485,000	[1]
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	2.17%	[1],[2]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	60,045,000	[1]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	58,721,000	[1]
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	2.55%	[1],[2]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	20,177,000	[1]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	19,905,000	[1]
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	3.74%	[1],[2]
Available-for-sale Securities, Amortized Cost Basis	218,900,000		207,952,000
Available-for-sale Securities	218,433,000		210,984,000
Available for sale Securities, Weighted Average Yield	2.38%	[2]
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	3,683,000	[3]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	3,652,000	[3]
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	4.92%	[3]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	384,000	[3]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	390,000	[3]
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	2.06%	[3]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	25,194,000	[3]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	26,197,000	[3]
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	3.82%	[3]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	200,348,000	[3]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	197,205,000	[3]
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	1.93%	[3]
Available-for-sale Securities, Amortized Cost Basis	229,609,000	[3],[4]	313,239,000	[4]
Available-for-sale Securities	227,444,000	[3],[4]	317,927,000	[4]
Available for sale Securities, Weighted Average Yield	2.19%	[3]
Other Aggregated Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	15,353,000	[5]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	15,624,000	[5]
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	0.00%	[5]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	0	[5]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	0	[5]
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	0.00%	[5]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	0	[5]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	0	[5]
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	0.00%	[5]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	0	[5]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0	[5]
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	0.00%	[5]
Available-for-sale Securities, Amortized Cost Basis	15,353,000	[5]	12,526,000
Available-for-sale Securities	$ 15,624,000	[5]	$ 12,634,000
Available for sale Securities, Weighted Average Yield	0.00%	[5]

[1] Certain securities are callable before their final maturity.

[2] Yield shown on a fully taxable equivalent (FTE) basis.

[3] Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.

[4] All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.

[5] Other securities consist of money market mutual funds and equity securities held at certain non-bank affiliates.