Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Payroll and related items	$ 68,296	$ 67,600
Management incentive compensation	20,547	16,339
Income taxes payable	12,332	8,808
Insurance	9,450	9,416
Warranty	6,138	5,628
Deferred revenue	13,055	12,607
Restructuring	662	3,893
Liability for uncertain tax positions	1,350	1,366
Accrued interest	10,184	1,663
Other	28,209	25,532
Total accrued expenses	$ 170,223	$ 152,852