Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Benefit Plans [Abstract]
Employer contribution (in hundredths)	50.00%
Maximum annual contribution per employee (in hundredths)	6.00%
Contributions made by employer	$ 1,200,000	$ 921,000	$ 813,000
Retirement benefits paid per month	$ 25,000
Discount rate	3.37%
Maximum potential life expectancy	120 years
Disbursements under plan	$ 300,000	0	0
Retirement plan expense	(115,000)	$ 1,300,000	$ 112,000
Accrued potential future payouts	$ 3,800,000