CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 43,994	$ 70,703
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation of property and equipment	27,325	23,981
Amortization of definite-lived intangible and other assets	43,605	45,554
Amortization of program contract costs and net realizable value adjustments	26,950	31,019
Loss on extinguishment of debt, non-cash portion	0	1,404
Stock-based compensation expense	6,956	7,571
Deferred tax benefit	(16,342)	(4,269)
Gain on asset disposition, net of impairment	(20,324)	(53,347)
Loss from equity and cost method investments	(12,593)	(1,504)
Change in assets and liabilities, net of acquisitions:
Decrease in accounts receivable	26,504	1,543
Increase in prepaid expenses and other current assets	(18,353)	(5,539)
Decrease in accounts payable and accrued liabilities	(8,473)	(58,945)
Net change in net income taxes payable/receivable	241	32,513
Payments on program contracts payable	(28,492)	(28,600)
Other, net	4,759	4,550
Net cash flows from operating activities	100,943	69,642
CASH FLOWS (USED IN) FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(22,219)	(20,774)
Acquisition of businesses, net of cash acquired	0	(8,000)
Proceeds from the sale of assets	49	195,149
Investments in equity and cost method investees	(7,750)	(3,080)
Distributions from equity and cost method investees	10,832	3,272
Other, net	(1,862)	(8,408)
Net cash flows (used in) from investing activities	(20,950)	158,159
CASH FLOWS (USED IN) FROM FINANCING ACTIVITIES:
Proceeds from notes payable and commercial bank financing	363	163,089
Repayments of notes payable, commercial bank financing and capital leases	(16,950)	(284,422)
Net proceeds from the sale of Class A Common Stock	0	487,883
Dividends paid on Class A and Class B Common Stock	(18,392)	(16,257)
Other, net	(2,659)	(17,884)
Net cash flows (used in) from financing activities	(37,638)	332,409
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	42,355	560,210
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, beginning of period	995,940	260,184
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, end of period	$ 1,038,295	$ 820,394