Income Taxes Unrecognized Benefits (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		$ (1,400,000)	$ (1,600,000)	$ (1,200,000)
Interest Expense (Income) related to unrecognized tax benefits	$ (400,000)	200,000
Unrecognized tax benefit — Permanent tax positions		14,600,000	14,800,000
Unrecognized tax benefit — Temporary tax positions		4,800,000	4,900,000
Total unrecognized tax benefit		19,400,000	19,700,000
NOL and tax credit carryforwards		16,600,000	16,300,000
Net Deferred Tax Liability associated with the Unrecognized Tax Benefit Amounts and Related NOLs and Tax Credit Carryforwards		(12,500,000)	(11,300,000)
Decrease in Unrecognized Tax Benefits is Reasonably Possible		11,100,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued		$ 0	$ 0