Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Schedule of Stockholders Equity [Table Text Block]

Changes to equity during the nine months ended September 30, 2015, were as follows:

	General			Common -			Common -			Subordinated -
	Partner			Public			Western			Western			Total
	(In thousands)
Balance at December 31, 2014	$	—		$	327,592		$	(94,583	)	$	(260,103	)	$	(27,094	)
Unit-based compensation	—			931			—			—			931
Distributions to partners declared	(481		)	(16,560		)	(8,526		)	(23,838		)	(49,405		)
Net income attributable to limited partners	—			16,159			8,318			23,254			47,731
Other	—			(221		)	—			—			(221		)
Balance at September 30, 2015	$	(481	)	$	327,901		$	(94,791	)	$	(260,687	)	$	(28,058	)

Schedule of Incentive Distributions Made to Managing Members or General Partners by Distribution [Table Text Block]

The following table illustrates the percentage allocations of available cash from operating surplus between the unitholders and our General Partner (as the holder of our incentive distribution rights) based on the specified target distribution levels. The amounts set forth under the column heading "Marginal Percentage Interest in Distributions" are the percentage interests of our General Partner and the unitholders in any available cash from operating surplus we distribute up to and including the corresponding amount in the column "Total Quarterly Distribution per Unit Target Amount". The percentage interests shown for our unitholders and our General Partner for the minimum quarterly distribution are also applicable to quarterly distribution amounts that are less than the minimum quarterly distribution. The percentage interests set forth below assume our General Partner has not transferred its incentive distribution rights and there are no arrearages on common units.

	Total Quarterly Distribution per Unit Target Amount	Marginal Percentage Interest in Distributions
		Unitholders		General Partner
Minimum Quarterly Distribution	$0.2875	100.0	%	—
First Target Distribution	above $0.2875 up to $0.3306	100.0	%	—
Second Target Distribution	above $0.3306 up to $0.3594	85.0	%	15.0	%
Third Target Distribution	above $0.3594 up to $0.4313	75.0	%	25.0	%
Thereafter	above $0.4313	50.0	%	50.0	%

Distributions Made to Limited Partner, by Distribution [Table Text Block]

The table below summarizes our 2015 quarterly distribution declarations, payments and scheduled payments through October 30, 2015:

Declaration Date	Record Date	Payment Date	Distribution per Common and Subordinated Unit
January 30, 2015	February 13, 2015	February 23, 2015	$	0.3325
May 1, 2015	May 15, 2015	May 26, 2015	0.3475
July 31, 2015	August 14, 2015	August 24, 2015	0.3650
October 30, 2015	November 13, 2015	November 23, 2015	0.3825
Total			$	1.4275

During the first three quarters of 2015, we declared and paid distributions that were in excess of the target distribution amounts set forth in our partnership agreement, resulting in distributions to our General Partner as the holder of incentive distribution rights. The total quarterly cash distributions made to general and limited partners for the three and nine months ended September 30, 2015 and 2014, respectively, was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
	(In thousands, except per unit data)
General Partners' distributions:
General Partner's incentive distribution rights	$	326	$	—	$	481	$	—
Total General Partner's distributions	$	326	$	—	$	481	$	—
Limited partners' earnings on common units:
Common	$	8,766	$	7,014	$	25,086	$	19,291
Subordinated	8,326		7,014		23,838		19,291
Total limited partners' distributions	17,092		14,028		48,924		38,582
Total cash distributions	$	17,418	$	14,028	$	49,405	$	38,582
Cash distributions per limited partner unit	$	0.3650	$	0.3075	$	1.0450	$	0.8457