FDIC Indemnification Asset (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fdic Indemnification Asset Details 1
Balance, beginning	$ 121,677	$ 123,719	$ 143,221
Increase related to acquisition of The Bank of Asheville		42,218
Increase related to unfavorable changes in loss estimates	16,984	29,814	30,419
Increase related to reimbursable expenses	6,947	5,725	2,900
Cash received	(29,796)	(69,339)	(46,721)
Accretion of loan discount	(13,173)	(9,278)	(6,100)
Other	(80)	(1,182)
Balance, ending	$ 102,559	$ 121,677	$ 123,719