Premises and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Premises and equipment, net
Premises and equipment, gross	$ 108,588,000	$ 115,943,000
Accumulated depreciation and amortization	(57,699,000)	(63,218,000)
Premises and equipment, net	50,889,000	52,725,000
Depreciation and amortization expense
Depreciation and amortization expense	3,700,000	3,800,000	3,300,000
Land [Member]
Premises and equipment, net
Premises and equipment, gross	14,460,000	14,615,000
Buildings and Improvements [Member]
Premises and equipment, net
Premises and equipment, gross	49,463,000	51,538,000
Furniture and Equipment [Member]
Premises and equipment, net
Premises and equipment, gross	43,648,000	48,275,000
Leasehold Improvements [Member]
Premises and equipment, net
Premises and equipment, gross	$ 1,017,000	$ 1,515,000