Income Taxes (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Tax Cuts And Jobs Act of 2017, Impact Including Lower Tax Rate, On U.S. Income Tax Expense	$ 0.21
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount	1,643,000	$ (11,686,000)	$ 49,811,000
Foreign earnings before tax	70,405,000	85,368,000	84,637,000
Differences on international earnings and remittances	9,600,000	5,400,000
Total international income tax expense	23,775,000	17,127,000	19,763,000
Provisional tax expense from revaluing the U.S. ending net deferred tax assets		11,700,000
Operating loss carryforwards	85,378,000	81,755,000
Capital loss carryforwards	0	9,759,000
Valuation Allowance	127,074,000	137,450,000
Valuation allowance related to foreign tax credit carryfowards		15,200,000
Deferred Tax Assets, Valuation Allowance, Decrease Due to Altek Acquisition		13,600,000
Increase from foreign currency translation		8,700,000
Interest and penalties recognized	300,000	200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,200,000	900,000	$ 1,100,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	300,000
Valuation allowance adjustment related to the acquisition of Altek		8,300,000
Current Foreign Tax Expense (Benefit)	26,300,000	14,400,000
International operations
Income Tax Disclosure [Line Items]
Operating loss carryforwards	66,500,000
Operating loss carryforwards not subject to expiration	57,000,000.0
Operating losses subject to expiration	9,500,000
U.S. state
Income Tax Disclosure [Line Items]
Operating loss carryforwards	12,900,000
U.S. state | Tax Years 2029 Through 2033
Income Tax Disclosure [Line Items]
Operating loss carryforwards	3,200,000
United States
Income Tax Disclosure [Line Items]
Differences on international earnings and remittances	$ 1,000,000.0	$ 3,500,000