Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
401 (K) [Abstract]
Eligibility age, Minimum	18 years
Employer's matching of employee contribution (in hundredths)	50.00%	50.00%	50.00%
Employee contribution matched (in hundredths)	6.00%	6.00%	6.00%
Employment term eligibility, Minimum	3 months
Employee contribution vesting period	5 years
Defined Benefit Plan, Contributions by Employer	$ 165,000
401(k) expense	$ 632,000	$ 744,000	$ 705,000