STOCK-BASED COMPENSATION - Summary of Common Stock Option Activity (Details) $ / shares in Units, $ in Thousands		6 Months Ended
	Jan. 01, 2019 shares	Jun. 30, 2020 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | $		$ 32,752
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number		607,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares		$ 23.87
Award vesting period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,327,352
Shares (in thousands)
Beginning balance (in shares)		1,000,000
Granted (in shares)		0
Exercised (in shares)		(275,000)
Forfeited (in shares)		(9,000)
Canceled (in shares)		(1,000)
Ending balance (in shares)		715,000
Weighted-Average Exercise Price
Beginning balance (in usd per share) | $ / shares		$ 22.99
Granted (in usd per share) | $ / shares		0
Exercised (in usd per share) | $ / shares		19.71
Forfeited (in usd per share) | $ / shares		28.71
Canceled (in usd per share) | $ / shares		28.96
Ending balance (in usd per share) | $ / shares		$ 24.17
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | $		$ 27,983
Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		6 years 1 month 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		5 years 11 months 26 days