Loans and Allowance for Loan Losses (Purchased Loans with Deteriorated Credity Quality) (Details) (Granite Corp. [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Granite Corp. [Member]
Deterioarted Loans Acquired Movement Schedule [Roll Forward]
Balance, beginning of period	$ 228,392	$ 330,836
Accretion	16,032	20,549
Increase in future accretion	15,721	3,045
Payment received	(80,258)	(111,875)
Foreclosed and transferred to OREO	(2,514)	(11,118)
Subtotal before allowance	161,652	228,392
Subtotal before provision	(5,560)	(5,373)
Net carrying amount, end of period	156,092	223,019
Deteriorated Loans Acquired, Accretable Yield Movement Schedule [Roll Forward]
Future accretion balance, beginning of period	30,300	47,804
Accretion	(16,032)	(20,549)
Future accretion balance, end of period	$ 29,989	$ 30,300