Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 43,002	$ 35,539
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,607	18,907
Equity method earnings	0	(456)
Gain on step acquisitions	0	(13,644)
Loss on extinguishment of debt	0	7,220
Foreign currency losses	458	1,764
Stock-based compensation	5,041	6,761
Deferred taxes	1,668	10,062
Non-cash lease expense	11,375	0
Changes in operating assets and liabilities:
Accounts receivable	(4,145)	(8,589)
Inventories, net	(7,271)	(6,624)
Prepaid expenses and other	(15,540)	(12,915)
Other assets	(180)	(974)
Accounts payable	5,157	2,179
Accrued expenses	(68,842)	(36,230)
Other liabilities	1,484	(4,113)
Net cash provided by operating activities	(8,186)	(1,113)
Cash flows from investing activities:
Purchases of property and equipment	(13,765)	(12,652)
Proceeds on investment sales	7,444	7,781
Purchases of investments	(4,321)	(4,539)
Acquisitions and investments in equity investees	(7,500)	(33,061)
Net cash used in investing activities	(18,142)	(42,471)
Cash flows from financing activities:
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	(2,156)	299
Payments of debt	(134,455)	(9,094)
Payment of cash dividends	(20,531)	(19,801)
Proceeds from debt	105,000	75,943
Repurchases of shares of common stock	(825)	(17,386)
Net cash used in financing activities	(52,967)	29,961
Effect of exchange rate changes on cash	2,672	8,708
Net increase (decrease) in cash and cash equivalents	(76,623)	(4,915)
Cash and cash equivalents, beginning of period	386,911	426,399
Cash and cash equivalents, end of period	$ 310,288	$ 421,484