Income Taxes Unrecognized Benefits (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Uncertainty [Abstract]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ (1,700,000)	$ (1,600,000)	$ (1,200,000)
Interest Expense (Income) related to unrecognized tax benefits	(100,000)	(400,000)
Unrecognized tax benefit — Permanent tax positions	15,500,000	14,800,000
Unrecognized tax benefit — Temporary tax positions	4,800,000	4,900,000
Total unrecognized tax benefit	20,300,000	19,700,000
NOL and tax credit carryforwards	17,500,000	16,300,000
Net Deferred Tax Liability associated with the Unrecognized Tax Benefit Amounts and Related NOLs and Tax Credit Carryforwards	(12,600,000)	(11,300,000)
Decrease in Unrecognized Tax Benefits is Reasonably Possible	13,700,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0	$ 0