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Summary of Signficant Accounting Policies Noncontrolling Interest (Details) € in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 SEK (kr)
Noncontrolling Interest [Line Items]
Share Price of the Equity Method Investment | kr							kr 93
Reedemable NCI, Put Option	$ 24,000		$ 24,000			€ 21,000
Redeemable NCI, Call Option	26,000		26,000			€ 23,000
Redeemable noncontrolling interest	24,077		24,077	$ 0
Payments to Acquire Additional Interest in Subsidiaries		$ 19,000
Notes issued in connection with purchase of noncontrolling interest			14,196	$ 0	$ 0
Adjustments to Additional Paid in Capital, Other			49,520
Europe [Member]
Noncontrolling Interest [Line Items]
Notes issued in connection with purchase of noncontrolling interest		14,000
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Dividends Payable	7,000		7,000
Adjustments to Additional Paid in Capital, Other	(12,000)	(10,000)	22,415
Additional Paid-in Capital [Member]
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other	(18,000)	$ (9,000)	27,105
Long Term [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Dividends Payable	5,000		5,000
Short Term [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Dividends Payable	$ 2,000		$ 2,000

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