Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Provision for federal income taxes	$ 2,064	$ 1,381	$ 5,225	$ 3,367
Effective income tax rate	31.00%	41.00%	30.00%	31.00%
One-time nonrecurring regulatory expense		1,500		1,500
Statutory tax rate			35.00%	34.00%
Deferred tax asset	$ 13,300		$ 13,300