Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Taxes [Line Items]
Cumulative undistributed earnings of foreign subsidiaries				$ 330,000
Income tax incentives		$ 3,999	$ 8,247
Net impact of tax incentives, per diluted share		$ 0.10	$ 0.17
Unrecognized tax benefits including interest and penalties		$ 400
Accrued income tax penalties and interest on unrecognized tax benefits		100
State And Local Jurisdiction [Member]
Income Taxes [Line Items]
Income tax expense on foreign earnings expected to be repatriated	$ 9,400
Foreign Country [Member]
Income Taxes [Line Items]
Income tax expense on foreign earnings expected to be repatriated	$ 30,700
China [Member]
Income Taxes [Line Items]
Income tax incentives		$ 0	$ 1,449
Malaysia [Member}
Income Taxes [Line Items]
Income tax holidays expiration date		2021
Income tax incentives		$ 2,294	3,219
Thailand [Member]
Income Taxes [Line Items]
Income tax holidays expiration date		2028
Income tax incentives		$ 1,705	$ 3,579