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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	15. SUBSEQUENT EVENTS On April 15, 2019, we redeemed $150.0 million of principal amount outstanding of the 5¹⁄₂% Notes at a redemption price of 100.0% for each $1,000 principal amount redeemed or approximately $150.0 million. Such redemption was funded with $117.9 million of available cash and $32.1 million of borrowings under our revolving credit facility. Upon completion of the partial redemption, $50.0 million principal amount of the 5¹⁄₂% Notes remained outstanding. See Note 6.