Loans and Asset Quality Information (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance, beginning, carrying value	$ 8,784	$ 5,751
Additions due to acquisition of The Bank of Asheville		17,645
Change due to payments received	(399)	(1,293)
Transfer to foreclosed real estate	(4,149)	(10,573)
Change due to loan charge-off	172	(3,329)
Other	417	583
Balance, ending, carrying value	4,825	8,784
Contractual Principal Receivable
Balance, beginning, contractual principal	18,316	8,080
Additions due to acquisition of The Bank of Asheville		38,452
Change due to payments received	(355)	(1,620)
Transfer to foreclosed real estate	(7,636)	(19,881)
Change due to loan charge-off	(359)	(7,522)
Other	(1,151)	807
Balance, ending, contractual principal	8,815	18,316
Fair Value Adjustment Write Down
Balance, beginning, FMV	9,532	2,329
Additions due to acquisition of The Bank of Asheville		20,807
Change due to payments received	44	(327)
Transfer to foreclosed real estate	(3,487)	(9,308)
Change due to loan charge-off	(531)	(4,193)
Other	(1,568)	224
Balance, ending, FMV	$ 3,990	$ 9,532