Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Real Estate Owned [Line Items]
Other Real Estate Owned, established through acquisition	$ 2,752	$ 14,708
Balance, beginning of period	35,927	26,987
Transfers in, net of write-downs ($0 and $90, respectively)	10,200	18,100
Other Real Estate Owned, additions and improvements	0	3,577
Writedowns Previously Recorded On Transfer In Of Real Estate Acquired Through Foreclosure	0	90
Additional OREO write-downs	(4,039)	(2,035)
Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans	28,559	35,949
Net realized gain on sale of other real estate owned	5,909	10,539	11,634
Balance, end of period	$ 22,190	$ 35,927	$ 26,987