Investment Securities (Contractual Maturities of Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Contractual maturities of securities
Available for Sale, Cost Basis, After 1 year but within 5 years	$ 13,843
Available for Sale, Cost Basis, After 5 years but within 10 years	15,661
Available for Sale, Cost Basis, After 10 years but within15 years	56,008
Available for Sale, Cost Basis, Over 15 years	55,259
Available for Sale, Cost Basis, Total	140,771
Available for Sale, Fair Value, After 1 year but within 5 years	13,881
Available for Sale, Fair Value, After 5 years but within 10 years	16,419
Available for Sale, Fair Value, After 10 years but within15 years	58,367
Available for Sale, Fair Value, Over 15 years	57,822
Available for Sale, Fair Value, Total	146,489
Held to Maturity, Cost Basis, Within 1 year	2,000
Held to Maturity, Cost Basis, After 1 year but within 5 years	1,000
Held to Maturity, Cost Basis, After 5 years but within 10 years	761
Held to Maturity, Cost Basis, After 10 years but within 15 years	1,012
Held to Maturity, Cost Basis, Over 15 years	11,604
Held to Maturity, Cost Basis, Total	16,377
Held to Maturity, Fair Value, Within 1 year	1,999
Held to Maturity, Fair Value, After 1 year but within 5 years	995
Held to Maturity, Fair Value, After 5 years but within 10 years	751
Held to Maturity, Fair Value, After 10 years but within 15 years	1,017
Held to Maturity, Fair Value, Over 15 years	12,085
Held to Maturity, Fair Value, Total	16,847
U.S. Agency [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, After 1 year but within 5 years	5,850
Available for Sale, Cost Basis, After 5 years but within 10 years	1,000
Available for Sale, Cost Basis, After 10 years but within15 years
Available for Sale, Cost Basis, Over 15 years
Available for Sale, Cost Basis, Total	6,850
Available for Sale, Fair Value, After 1 year but within 5 years	5,911
Available for Sale, Fair Value, After 5 years but within 10 years	992
Available for Sale, Fair Value, After 10 years but within15 years
Available for Sale, Fair Value, Over 15 years
Available for Sale, Fair Value, Total	6,903
U.S. Agency mortgage-backed securities [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, After 1 year but within 5 years
Available for Sale, Cost Basis, After 5 years but within 10 years	13,661
Available for Sale, Cost Basis, After 10 years but within15 years	56,008
Available for Sale, Cost Basis, Over 15 years	55,259
Available for Sale, Cost Basis, Total	124,928
Available for Sale, Fair Value, After 1 year but within 5 years
Available for Sale, Fair Value, After 5 years but within 10 years	14,424
Available for Sale, Fair Value, After 10 years but within15 years	58,367
Available for Sale, Fair Value, Over 15 years	57,822
Available for Sale, Fair Value, Total	130,613
Held to Maturity, Cost Basis, Within 1 year
Held to Maturity, Cost Basis, After 1 year but within 5 years
Held to Maturity, Cost Basis, After 5 years but within 10 years	761
Held to Maturity, Cost Basis, After 10 years but within 15 years
Held to Maturity, Cost Basis, Over 15 years	10,609
Held to Maturity, Cost Basis, Total	11,370
Held to Maturity, Fair Value, Within 1 year
Held to Maturity, Fair Value, After 1 year but within 5 years
Held to Maturity, Fair Value, After 5 years but within 10 years	751
Held to Maturity, Fair Value, After 10 years but within 15 years
Held to Maturity, Fair Value, Over 15 years	11,093
Held to Maturity, Fair Value, Total	11,844
Corporate bonds [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, After 1 year but within 5 years	7,993
Available for Sale, Cost Basis, After 5 years but within 10 years	1,000
Available for Sale, Cost Basis, After 10 years but within15 years
Available for Sale, Cost Basis, Over 15 years
Available for Sale, Cost Basis, Total	8,993
Available for Sale, Fair Value, After 1 year but within 5 years	7,970
Available for Sale, Fair Value, After 5 years but within 10 years	1,003
Available for Sale, Fair Value, After 10 years but within15 years
Available for Sale, Fair Value, Over 15 years
Available for Sale, Fair Value, Total	8,973
Corporate bonds and other securities [Member]
Contractual maturities of securities
Held to Maturity, Cost Basis, Within 1 year	2,000
Held to Maturity, Cost Basis, After 1 year but within 5 years	1,000
Held to Maturity, Cost Basis, After 5 years but within 10 years
Held to Maturity, Cost Basis, After 10 years but within 15 years	1,012
Held to Maturity, Cost Basis, Over 15 years	995
Held to Maturity, Cost Basis, Total	5,007
Held to Maturity, Fair Value, Within 1 year	1,999
Held to Maturity, Fair Value, After 1 year but within 5 years	995
Held to Maturity, Fair Value, After 5 years but within 10 years
Held to Maturity, Fair Value, After 10 years but within 15 years	1,017
Held to Maturity, Fair Value, Over 15 years	992
Held to Maturity, Fair Value, Total	$ 5,003

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