Statement of Cash Flows Supplemental Disclosure (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash paid (refunded) during the year for:
Interest on deposits and borrowings	$ 18,053	$ 31,411	$ 39,999
Income taxes (refunds)		(3,537)	(4,480)
Supplemental schedule of noncash activities:
Loans transferred to held for sale	1,214	95,194
Transfers from loans to real estate owned	7,181	19,178	33,936
Transfers from real estate owned to premises and equipment	1,746
Transfers from premises and equipment to assets held for sale		$ 1,750