Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The Partnership's intangible assets consist of the following (in thousands):



	December 31, 2015			December 31, 2014
Contract intangibles	$	81,109		$	82,972
Other intangibles	5,076			3,004
Less accumulated amortization	(29,258		)	(25,243		)
Total intangible assets, net	$	56,927		$	60,733

Estimated Amortization Expense

The estimates of amortization expense for the periods as indicated below are based on current mining plans and are subject to revision as those plans change in future periods.



For the Year Ended December 31,	Estimated Amortization Expense
	(in thousands)
2016	$	3,544
2017	3,095
2018	3,108
2019	3,108
2020	3,108