Employee Benefit Plan - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Curtailment charge	$ 0	$ 2,063,000	$ 2,173,000
Settlement charges	(739,000)	(1,162,000)	(3,698,000)
Settlement losses and curtailment charges	0	(2,063,000)	(5,871,000)
Prepaid pension asset	35,117,000	33,356,000
Accumulated benefit obligation of the pension plan	23,531,000	26,741,000	25,828,000
Net periodic pension cost included in accumulated other comprehensive loss	5,400,000	8,700,000
Estimated actuarial loss that will be amortized from accumulated other comprehensive income into net periodic pension cost , next fiscal year	500,000
Deferred compensation plan, contributions			$ 200,000