Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net income	$ 124,201	$ 26,683
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	105,721	134,894
Stock-based compensation expense	44,939	45,300
Deferred taxes	(49,414)	(18,019)
Loss (gain) from divested operations	2,075	(25,460)
Amortization of lease right-of-use assets	42,556	0
Amortization and write-off of deferred financing fees	3,238	10,601
Changes in assets and liabilities, net of divestitures:
Fees receivable, net	140,841	81,222
Deferred commissions	22,974	21,818
Prepaid expenses and other current assets	16,734	(82,908)
Other assets	(49,524)	23,862
Deferred revenues	47,923	87,316
Accounts payable, accrued, and other liabilities	(189,186)	(128,562)
Cash provided by operating activities	263,078	176,747
Investing activities:
Additions to property, equipment and leasehold improvements	(59,479)	(40,126)
Divestitures - cash received (net of cash transferred)	0	406,542
Other, net	(2,295)	0
Cash (used in) provided by investing activities	(61,774)	366,416
Financing activities:
Proceeds from employee stock purchase plan	9,077	7,627
Proceeds from borrowings	5,000	0
Payments on borrowings	(109,647)	(858,609)
Purchases of treasury stock	(46,558)	(96,271)
Cash (used in) financing activities	(142,128)	(947,253)
Net increase (decrease) in cash and cash equivalents and restricted cash	59,176	(404,090)
Effects of exchange rates on cash and cash equivalents and restricted cash	614	(3,012)
Cash and cash equivalents and restricted cash, beginning of period	158,663	567,058
Cash and cash equivalents and restricted cash, end of period	$ 218,453	$ 159,956