Premises and Equipment - (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Premises and Equipment [Line Items]
Premises and Equipment	$ 164,959	$ 119,862
Accumulated Depreciation and Amortization	(90,505)	(67,113)
Net	74,454	52,749
Land
Premises and Equipment [Line Items]
Premises and Equipment	17,992	14,692
Buildings and Leasehold Improvements
Premises and Equipment [Line Items]
Premises and Equipment	92,693	62,606
Equipment
Premises and Equipment [Line Items]
Premises and Equipment	$ 54,274	$ 42,564