STOCK REPURCHASE PROGRAM (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Apr. 18, 2019
Stock repurchase program
Aggregate amount of share repurchases (in dollars)	$ 4,096	$ 45,000	$ 19,096	$ 3,905
Common stock repurchased (retired and held in treasury) (in shares)	34	480	193	668
Common stock repurchased (retired and held in treasury)	$ 4,100	$ 45,000	$ 19,100	$ 61,700
Common stock repurchased and retired (in shares)				623
Common stock repurchased and retired		$ 44,990		$ 57,787
Remaining authorized repurchase amount	$ 345,900		$ 345,900
Stock Repurchase Program April 18, 2019
Stock repurchase program
Share repurchases authorized amount					$ 350,000