Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The Partnership's intangible assets included on its Consolidated Balance Sheets are as follows:

	March 31,			December 31,
(In thousands)	2018			2017
Intangible assets	$	86,336		$	86,336
Less: accumulated amortization	(37,567		)	(36,782		)
Total intangible assets, net	$	48,769		$	49,554