Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flow from operating activities:
Net income	$ 122,268	$ 197,436
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	14,284	15,585
Related party Tax Receivable Agreement benefit	(3,346)	0
Deferred income tax provision	6,348	6,427
Interest expense	1,594	1,588
Other charges, net	(838)	3,268
Net change in working capital	(130)	(71,443)
Change in long-term assets and liabilities	(897)	3,956
Net cash provided by operating activities	139,283	156,817
Cash flow from investing activities:
Capital expenditures	(13,901)	(14,569)
Proceeds from the sale of assets	62	74
Net cash used in investing activities	(13,839)	(14,495)
Cash flow from financing activities:
Repurchase of common stock-non-related party	(30,099)	0
Payments Related to Tax Withholding for Share-based Compensation	(46)	0
Principal repayments on long-term debt	0	(125,000)
Dividends paid to non-related-party	(5,926)	(5,194)
Dividends paid to related-party	(16,933)	(19,502)
Net cash used in financing activities	(53,004)	(149,696)
Net change in cash and cash equivalents	72,440	(7,374)
Effect of exchange rate changes on cash and cash equivalents	(1,266)	(217)
Cash and cash equivalents at beginning of period	80,935	49,880
Cash and cash equivalents at end of period	152,109	42,289
Net change in working capital due to changes in the following components:
Accounts and notes receivable, net	40,743	(31,389)
Inventories	(17,236)	(4,705)
Prepaid expenses and other current assets	7,411	7,425
Income taxes payable	14,238	(38,333)
Accounts payable and accruals	(45,245)	(5,305)
Interest payable	(41)	864
Net change in working capital	$ (130)	$ (71,443)