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Mortgage Banking Activities (Details1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capitalized mortgage servicing rights
Beginning balance	$ 6,375	$ 6,400	$ 6,228
Originations	2,395	2,204	2,621
Amortized to expense	(2,584)	(2,229)	(2,449)
Ending balance	6,186	6,375	6,400
Less valuation allowance	(680)	(1,785)	(285)
Net balance	$ 5,506	$ 4,590	$ 6,115

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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