CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 18, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues		$ 325,662	$ 338,649
Operating expense:
Cost of services and products (exclusive of depreciation and amortization)		137,755	148,319
Selling, general and administrative expenses		67,817	74,367
Depreciation and amortization		82,738	99,243
Income from operations		37,352	16,720
Other income (expense):
Interest expense, net of interest income		(32,095)	(34,283)
Gain on extinguishment of debt		234
Investment income		10,579	8,601
Other, net		4,594	(1,369)
Income (loss) before income taxes		20,664	(10,331)
Income tax expense (benefit)		5,041	(3,145)
Net income (loss)		15,623	(7,186)
Less: net income attributable to noncontrolling interest		76	79
Net income (loss) attributable to common shareholders		$ 15,547	$ (7,265)
Net loss per common share - basic and diluted
Net income (loss) per basic and diluted common shares attributable to common shareholders		$ 0.22	$ (0.11)
Dividends declared per common share (in dollars per share)	$ 0.38738		$ 0.39	$ 0.38738