Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Annual Rental Commitments under Operating Leases

Anticipated future lease costs are based in part on certain assumptions to approximate minimum annual rental commitments at December 31, 2017 under non-cancelable operating leases are as follows:

Year Ending December 31,
2018	$	5,284
2019	$	3,799
2020	$	2,670
2021	$	2,511
2022	$	2,382
Thereafter	$	3,375

Summary of Warranty Provision

The following presents a summary of the warranty provision for the years ended December 31:

	2017			2016
Balance - Beginning of the year	$	5,552		$	7,580
Provision for new warranty claims	3,461			1,798
Change in provision for preexisting warranty claims	(1,065		)	389
Deduction for payments made	(4,579		)	(3,819		)
Currency translation adjustment	121			(396		)
Balance - End of year	$	3,490		$	5,552

Schedule of Minimum Principal Payments Due on Long-term Debt

The following table provides future minimum principal payments due on long-term debt for the next five fiscal years and the remaining years thereafter:

Year Ending December 31,
2018	$	4,375
2019	$	4,375
2020	$	4,375
2021	$	4,375
2022	$	4,375
Thereafter	$	150,938