Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Impaired loans with specific valuation allowances	$ 17,574		$ 27,257
Other real estate owned	2,606	5,684	6,552	12,251	18,086	21,270
MSRs	1,786	1,546	1,308	774	300	0
Fair Value, Inputs, Level 1 [Member]
Impaired loans with specific valuation allowances	0		0
Other real estate owned	0		0
MSRs			0
Assets, Fair Value Disclosure, Nonrecurring	0		0
Fair Value, Inputs, Level 2 [Member]
Impaired loans with specific valuation allowances	0		0
Other real estate owned	0		0
MSRs			0
Assets, Fair Value Disclosure, Nonrecurring	0		0
Fair Value, Inputs, Level 3 [Member]
Impaired loans with specific valuation allowances	17,574		34,383
Other real estate owned	2,606		6,552
MSRs	1,786		1,308
Assets, Fair Value Disclosure, Nonrecurring	$ 20,180		$ 42,243