Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Payroll and related items	$ 62,714	$ 67,600
Management incentive compensation	14,447	16,339
Income taxes payable	9,581	8,808
Insurance	9,312	9,416
Warranty	5,860	5,628
Deferred revenue	15,582	12,607
Restructuring	1,535	3,893
Liability for uncertain tax positions	2,285	1,366
Accrued interest	1,485	1,663
Other	23,023	25,532
Total accrued expenses	$ 145,824	$ 152,852