Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 173,553	$ 121,887	$ 129,437
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	76,650	83,003	71,564
Impairment of fixed assets	0	48,551	0
Equity method earnings	0	(456)	(1,048)
Gain on step acquisition	0	(13,644)	0
Loss on extinguishment of debt	0	7,220	0
Foreign currency (gains)/losses	3,829	16,381	(3,014)
Stock-based compensation	9,909	26,609	19,314
Deferred taxes	1,965	(14,929)	39,213
Non-cash lease expense	44,460	0	0
Changes in operating assets and liabilities:
Accounts receivable	2,746	(10,453)	(103)
Inventories, net	18,446	(33,371)	7,537
Prepaid expenses and other	(17,435)	(1,536)	14,250
Other assets	(67,109)	887	(11,658)
Accounts payable	(7,184)	(9,164)	6,834
Accrued expenses	(86,997)	(7,433)	22,490
Other liabilities	25,098	(10,814)	7,739
Net cash provided by operating activities	177,931	202,738	302,555
Cash flows from investing activities:
Purchases of property and equipment	(66,067)	(70,371)	(60,156)
Proceeds on investment sales	11,160	11,536	11,269
Purchases of investments	(8,432)	(11,420)	(11,332)
Acquisitions (net of cash acquired)	(8,073)	(38,506)	(31,745)
Net cash used in investing activities	(71,412)	(108,761)	(91,964)
Cash flows from financing activities:
Payment of cash dividends	(82,189)	(80,581)	(76,058)
Repurchase of shares of common stock	(825)	(69,565)	(71,731)
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	(2,325)	10,777	24,443
Payments on long-term debt	(214,455)	(552,500)	(103,226)
Payment of debt issuance costs	0	(7,243)	0
Proceeds from long-term debt	145,000	582,398	67,000
Net cash used in financing activities	(154,794)	(116,714)	(159,572)
Effect of exchange rate changes on cash	(3,006)	(16,751)	18,134
Net increase (decrease) in cash and cash equivalents	(51,281)	(39,488)	69,153
Cash and cash equivalents, beginning of period	386,911	426,399	357,246
Cash and cash equivalents, end of period	$ 335,630	$ 386,911	$ 426,399