Loans Receivable (Details 12) (Impaired Purchased Other Loans [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	$ 5,007	$ 1,603	$ 3,574	$ 1,138
Commercial business [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	4,540	1,138	3,043	683
Consumer [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	10	231	55	338
Commercial and industrial [Member] | Commercial business [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	3,193	17	1,815	13
Owner-occupied commercial real estate [Member] | Commercial business [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	161	143	149	72
Non-owner occupied commercial real estate [Member] | Commercial business [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	1,186	978	1,079	598
One-to-four family residential [Member]
Average recorded investment impaired purchased other financing receivable
Average Recorded Investment on Impaired Loans	$ 457	$ 234	$ 476	$ 117