CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income		$ 24,181	$ 110,141	$ 75,789
Other comprehensive income:
Unrealized gain (loss) on available-for-sale securities	[1]	56	(205)	87
Comprehensive income		24,237	109,936	75,876
Less: comprehensive income (loss) attributable to non-controlling interest			(66)	(2,090)
Comprehensive income attributable to Magellan		$ 24,237	$ 110,002	$ 77,966

[1] Net of income tax expense (benefit) of $51, $(8) and $18 for the years ended December 31, 2016, 2017 and 2018, respectively.