Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary Of Income Taxes [Line Items]
Valuation allowance	$ 1,746,000	$ 254,000
Foreign tax credits	8,200,000
State net operating losses	1,400,000
Income tax deficiency	101,171,000	49,227,000	$ (65,836,000)
Liability recorded for interest and penalties on unrecognized tax benefits	0	0	$ 0
Domestic Tax Authority
Summary Of Income Taxes [Line Items]
Operating loss carryforwards	37,700,000
State and Local Jurisdiction
Summary Of Income Taxes [Line Items]
Operating loss carryforwards	109,400,000
Accounting Standards Update 2016-09
Summary Of Income Taxes [Line Items]
Income tax deficiency	$ (1,400,000)	$ 400,000