Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes
Previously taxed foreign income, repatriated	$ 1,900,000	$ 0	$ 1,300,000
Undistributed foreign earnings	$ 322,000,000
U.S. statutory rate	35.00%	35.00%	35.00%
Income taxes payable	$ 10,500,000	$ 4,800,000
Unrecognized tax benefits	3,536,000
Unrecognized tax benefits would impact the effective tax rate	2,800,000
Interest accrued	415,000	300,000
Tax credit carryforward tax assets	$ 300,000	1,800,000
Tax credit carryforward, expiration date	2026
Valuation allowances	$ 832,000	1,984,000
U.S.
Income Taxes
Cash and cash equivalents and short-term investments	279,800,000	219,300,000
Operating loss carryforwards	0	0
Foreign
Income Taxes
Cash and cash equivalents and short-term investments	309,600,000	266,400,000
Operating loss carryforwards	$ 700,000	$ 1,100,000
United States | Tax Year 2011
Income Taxes
Tax years settled which were under tax examination	2011
United States | Tax Year 2012
Income Taxes
Tax years settled which were under tax examination	2012
United States | Earliest Tax Year
Income Taxes
Tax years subject to examination	2013
Germany | Earliest Tax Year
Income Taxes
Tax years subject to examination	2013
Poland | Earliest Tax Year
Income Taxes
Tax years subject to examination	2012
China | Earliest Tax Year
Income Taxes
Tax years subject to examination	2012
Spain | Earliest Tax Year
Income Taxes
Tax years subject to examination	2013
United Kingdom | Earliest Tax Year
Income Taxes
Tax years subject to examination	2015