Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Taxes [Line Items]
Cumulative undistributed earnings of foreign subsidiaries			$ 330,000
Income tax incentives	$ 1,676	$ 2,874
Net impact of tax incentives, per diluted share	$ 0.04	$ 0.06
Unrecognized tax benefits including interest and penalties	$ 400
Interest on unrecognized tax	100
Penalty on unrecognized tax	17
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	422
Malaysia [Member}
Income Taxes [Line Items]
Income tax holidays expiration date	2021
Income tax incentives	$ 646	1,308
Thailand [Member]
Income Taxes [Line Items]
Income tax holidays expiration date	2028
Income tax incentives	$ 1,030	$ 1,144