Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Amortized Cost
Due within one year
Due after one year but within five years	17,498
Due after five years but within ten years
Due after ten years	1,000
Mortgage-backed securities	163,028
Total debt securities	181,526
Equity securities	3,985
Total securities	185,511	164,063
Fair Value
Due within one year
Due after one year but within five years	17,515
Due after five years but within ten years
Due after ten years	600
Mortgage-backed securities	164,527
Total debt securities	182,642
Equity securities	3,992
Total securities	186,634	167,352	171,907
Amortized Cost
Due within one year
Due after one year but within five years	5,428
Due after five years but within ten years	35,449
Due after ten years	13,484
Mortgage-backed securities
Total debt securities	54,361	56,064	56,182
Total securities	54,361
Fair Value
Due within one year
Due after one year but within five years	5,868
Due after five years but within ten years	38,127
Due after ten years	14,381
Total debt securities	58,376
Securities held to maturity	$ 58,376	$ 61,496	$ 61,676