Recent Accounting Pronouncements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Noninterest expense reduction	$ (10,725)	$ (9,629)	$ (30,974)	$ (28,955)
Efective tax rate	16.00%	21.00%	17.00%	21.00%
Accounting Standards Update 2014-01 [Member] | Scenario, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Noninterest expense reduction	$ 327	$ 271	$ 981	$ 811
Accounting Standards Update 2014-01 [Member] | Scenario, Actual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Efective tax rate	23.00%	25.00%	23.00%	25.00%