CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 21,663	$ (6,170)
Share of other comprehensive income (loss) of equity method investments	(31)	0
Reclassification adjustment for sale of equity method investments	0	82
Total comprehensive income (loss)	$ 21,632	$ (6,088)