SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Adjustments to Opening Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Inventories	$ 375,795		$ 381,110	$ 330,152	$ 337,216
Prepaid and other	115,048	$ 116,862	118,245	116,202	109,791
Liabilities
Accounts payable, accrued and other liabilities	573,028	$ 545,707	525,199	455,873	461,579
Deferred income taxes	41,388		53,917	22,287	20,995
Deferred and other non-current liabilities	23,250		23,465	6,432	5,608
Stockholders' Equity
Retained earnings	$ 1,523,820		1,371,826	1,304,084	$ 1,301,147
Adjustment/Effect of Change | Accounting Standards Update 2014-09
Assets
Inventories			(10,205)	(7,064)
Prepaid and other			9,755	6,411
Liabilities
Accounts payable, accrued and other liabilities			(3,969)	(5,706)
Deferred income taxes			1,005	1,292
Deferred and other non-current liabilities			399	824
Stockholders' Equity
Retained earnings			$ 2,115	$ 2,937