Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Net operating loss carryforward		$ 226,200,000
Valuation allowance increase	$ 6,700,000
Net deferred tax asset	136,477,000	104,380,000
Unrecognized tax benefits	3,962,000	3,387,000	$ 312,000	$ 3,180,000
Unrecognized tax benefits, accrued interest and penalties	400,000	200,000
Accounts Payable and Accrued Expenses [Member]
Income Tax [Line Items]
Current taxes payable	38,200,000	15,000,000.0
Other Assets [Member]
Income Tax [Line Items]
Current taxes receivable	$ 0	$ 0