Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2018

Compensation Related Costs [Abstract]

Long-Term Incentive Compensation Plan Expense

The following table summarizes the outstanding LTIP awards as of December 31, 2018:

	Units Outstanding	Maximum Value		Inception to date earned through December 31, 2018 on outstanding units
2014 grant	181,750	$	18,175,000	$	15,328,795
2015 grant	194,750	19,475,000		15,272,295
2016 grant	217,500	21,750,000		12,371,400
2017 grant	223,250	22,325,000		7,822,680
2018 grant	222,750	22,750,000		4,316,895

The following table summarizes the LTIP expense for each of the three years ended December 31, 2018:

(In thousands)	2018			2017		2016
2011 grant	$	—		$	—	$	(82	)
2013 grant	(1,124		)	7,667		8,918
2014 grant	3,227			3,167		3,503
2015 grant	5,170			3,667		4,072
2016 grant	5,148			3,601		4,002
2017 grant	4,700			3,162		—
2018 grant	4,317			—		—
Total	$	21,438		$	21,264	$	20,413