Employee Benefit Plan - Additional Information (Details) (401(k) retirement savings plan, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent		50.00%
Participants' compensation considered for match by Employer, percent		8.00%
Employer contribution, amount	$ 0.9	$ 0.9	$ 1.8	$ 1.6
Profit Sharing Contribution
Defined Benefit Plan Disclosure [Line Items]
Employer contribution, amount			$ 0.4	$ 0