Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value contingent consideration liability	$ 2,500		$ 6,700
Change in contingent consideration liability	(4,200)
Long-term Debt, Fair Value	370,000	$ 370,000	370,000
Nonrecurring fair value measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired fixed assets				$ 17,000
Contingent consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value contingent consideration liability	2,532	0	$ 6,705	$ 0
Change in contingent consideration liability	$ (4,173)	$ 0