Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Supplemental Schedule of Cash and Cash Equivalents [Abstract]
Cash and due from banks	$ 18,994	$ 18,529	$ 20,435
Interest-bearing deposits in other banks	37,720	10,380	27,007
Cash and Cash Equivalents	56,714	28,909	47,442	28,893
Cash paid for [Abstract]
Interest on deposits and borrowed funds	3,432	4,547
Income taxes	3,190	0
Noncash investing and financing activities [Abstract]
Transfer of loans to other real estate owned	1,049	2,705
Unrealized loss on securities available for sale	$ (8,380)	$ 448