Supplemental Consolidated Balance Sheet and Statement of Operations Information - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accrued Liabilities and Other Liabilities [Abstract]
Accrued vacation	$ 4,161	$ 3,604
Accrued commissions	2,497	2,470
Accrued bonuses	2,900	9,598
Estimated health insurance claims	1,492	900
Accrued other liabilities	3,528	3,822
Accrued expenses and other current liabilities	$ 14,578	$ 20,394