Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Activity in the other real estate owned (OREO) portfolio, net of valuation reserve
Balance at beginning of period	$ 72,423	$ 93,290
Property additions	6,985	15,918
Development improvements	50	318
Less: Property Disposals	11,661	5,346
Less: Period valuation adjustments	2,134	2,500
Balance at end of period	65,663	101,680
Activity in the valuation allowance
Balance at beginning of period	31,454	23,462
Provision for unrealized losses	1,987	2,500
Reductions taken on sales	(2,622)	(1,968)
Other adjustments	147
Balance at end of period	30,966	23,994
Expenses related to foreclosed assets, net of lease revenue
Gain on sales, net	(181)	(23)
Provision for unrealized losses	1,987	2,500
Operating expenses	1,699	2,154
Less: Lease revenue	408	1,179
Expenses related to foreclosed assets, net of lease revenue	$ 3,097	$ 3,452