Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Compensation and benefits	$ 8,721	$ 7,492
Provision for customer rebates, claims and allowances	9,201	8,882
Advanced customer deposits	5,687	8,212
Outstanding checks in excess of cash	3,247	2,074
Other	7,475	6,166
Accrued expenses	$ 34,331	$ 32,826