Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Deferred revenue	$ 16,645	$ 14,647
Holdbacks and earn-outs	13,674	9,959
Accrued other insurance	5,950	5,013
Deferred rent	5,371	4,791
Accrued health insurance	5,014	4,952
Miscellaneous accrued taxes	5,001	3,317
Accrued workers' compensation	4,019	3,212
Accrued accounting and legal fees	3,415	2,697
Customer deposits	1,966	2,971
Accrued lease payments	1,988	1,536
Other	18,864	17,733
Other accrued liabilities	$ 81,907	$ 70,828