Income Taxes - Components Of The Provision For Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Tax Expense (Benefit)
Federal									$ 5,448	$ 3,227	$ 4,169
State									1,337	835	1,106
Total									6,785	4,062	5,275
Deferred Expense(Benefit)
Federal									39	1,034	750
State									12	181	131
Total									51	1,215	881
Total Expense
Federal									5,487	4,261	4,919
State									1,349	1,016	1,237
Total	$ 1,991	$ 1,651	$ 2,239	$ 955	$ 1,042	$ 1,510	$ 1,635	$ 1,090	$ 6,836	$ 5,277	$ 6,156