Accounting Policies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Financing Receivable, Allowance for Credit Loss	$ 500,000		$ 500,000
Financing Receivable, Allowance for Credit Loss, Writeoff			2,500,000	$ 1.5
Interest Receivable	1,000,000		1,000,000			$ 1,200,000
Financing Receivable, Allowance for Credit Loss [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	476,728,000	$ 562,732,000	476,728,000	562,732,000	$ 502,055,000	511,024,000	$ 548,345,000	$ 558,157,000
Interest Receivable	1,000,000		1,000,000			$ 1,200,000
Financing Receivable, Allowance for Credit Loss, Writeoff			2,500,000	1.5
Financing Receivable, Allowance for Credit Loss	500,000		500,000
Accounts and Financing Receivable, Allowance for Credit Loss	1,700,000		1,700,000
Foreign Currency Transaction Gain (Loss), before Tax	$ 900,000	$ (1,800,000)	$ 1,300,000	$ (3,700,000)