Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 165,589	$ 38,436
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	158,119	203,081
Stock-based compensation expense	57,893	56,018
Deferred taxes	(50,790)	(4,746)
Loss (gain) from divested operations	2,075	(38,500)
Fair value adjustment - equity security	(9,120)	0
Amortization of lease right-of-use assets	63,692	0
Amortization and write-off of deferred financing fees	4,865	12,205
Changes in assets and liabilities, net of divestitures:
Fees receivable, net	215,132	172,679
Deferred commissions	35,329	38,216
Prepaid expenses and other current assets	(941)	(64,395)
Other assets	(46,954)	23,444
Deferred revenues	70,006	68,895
Accounts payable, accrued, and other liabilities	(182,294)	(79,322)
Cash provided by operating activities	482,601	426,011
Investing activities:
Additions to property, equipment and leasehold improvements	(95,701)	(64,631)
Acquisitions - cash paid	(2,295)	(15,855)
Divestitures - cash received (net of cash transferred)	0	520,709
Cash (used in) provided by investing activities	(97,996)	440,223
Financing activities:
Proceeds from employee stock purchase plan	13,235	11,134
Proceeds from borrowings	5,000	0
Payments on borrowings	(109,612)	(1,120,290)
Purchases of treasury stock	(141,436)	(104,400)
Cash used in financing activities	(232,813)	(1,213,556)
Net increase (decrease) in cash and cash equivalents and restricted cash	151,792	(347,322)
Effects of exchange rates on cash and cash equivalents and restricted cash	(3,728)	(6,444)
Cash and cash equivalents and restricted cash, beginning of period	158,663	567,058
Cash and cash equivalents and restricted cash, end of period	$ 306,727	$ 213,292