Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Noncurrent deferred tax assets:
Tax loss carryforwards	$ 24,600
U.S.
Noncurrent deferred tax assets:
Total deferred tax assets	35,624	$ 46,052
Net deferred tax liabilities	17,212	16,712
Net deferred tax asset	18,412	29,340
Non-U.S.
Noncurrent deferred tax assets:
Total deferred tax assets	22,816	22,908
Net deferred tax liabilities	11,989	11,629
Net deferred tax asset	10,827	11,279
Noncurrent deferred tax assets: \| U.S.
Noncurrent deferred tax assets:
Accounts receivable, net	672	823
Inventories	762	636
Accrued liabilities, deferred compensation	4,490	4,730
Property, plant, equipment and intangibles, net	0	0
Other noncurrent liabilities	12,498	14,885
Tax loss carryforwards	517	2,266
Tax credit carryforwards	9,236	15,931
Derivatives	3,283	1,411
Other noncurrent liabilities, reserves	2,704	2,953
Deferred revenue	1,471	2,417
Other		0
Noncurrent deferred tax assets before valuation allowance	35,633	46,052
Less: valuation allowance	(9)	0
Total deferred tax assets	35,624	46,052
Noncurrent deferred tax assets: \| Non-U.S.
Noncurrent deferred tax assets:
Accounts receivable, net	1,453	1,050
Inventories	1,995	1,231
Accrued liabilities, deferred compensation	1,064	1,386
Property, plant, equipment and intangibles, net	2,382	4,892
Other noncurrent liabilities	82	1,048
Tax loss carryforwards	24,509	21,467
Tax credit carryforwards	954	936
Derivatives	0	0
Other noncurrent liabilities, reserves	0	0
Deferred revenue	0	0
Other	638	0
Noncurrent deferred tax assets before valuation allowance	33,077	32,010
Less: valuation allowance	(10,261)	(9,102)
Total deferred tax assets	22,816	22,908
Noncurrent deferred tax liabilities: \| U.S.
Noncurrent deferred tax assets:
Unrepatriated foreign earnings	3,779	2,202
Property, plant, equipment and intangibles, net	3,122	4,404
Deferred gain	2,911	3,391
Flow-through deferred tax liabilities	6,881	6,205
Deferred revenue	0	0
Other	519	510
Net deferred tax liabilities	17,212	16,712
Noncurrent deferred tax liabilities: \| Non-U.S.
Noncurrent deferred tax assets:
Unrepatriated foreign earnings	0	0
Property, plant, equipment and intangibles, net	0	0
Deferred gain	0	0
Flow-through deferred tax liabilities	0	0
Deferred revenue	11,989	8,492
Other	0	3,137
Net deferred tax liabilities	$ 11,989	$ 11,629

Deferred Revenue.

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