Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Beginning balance	$ 22,577	$ 0
Acquired	29,441	22,577
Ending balance	52,018	22,577
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	60,507	57,220
Accumulated Amortization	44,946	38,148
Net Carrying Amount	15,561	19,072
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
December 31, 2014	3,859
December 31, 2015	2,779
December 31, 2016	1,606
December 31, 2017	1,447
December 31, 2018	1,314
Core deposit intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	58,707	55,420
Accumulated Amortization	44,652	38,029
Net Carrying Amount	14,055	17,391
Other
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	1,800	1,800
Accumulated Amortization	294	119
Net Carrying Amount	$ 1,506	$ 1,681