Partners' Capital (Details) $ / shares in Units, $ in Thousands						12 Months Ended
	May 08, 2015 USD ($) shares	Oct. 07, 2014 USD ($) shares	Oct. 07, 2014 USD ($) shares	Mar. 28, 2014 USD ($) $ / shares shares	Feb. 12, 2014 USD ($) shares	Dec. 31, 2014 USD ($) shares
Partners' Capital
Total proceeds from sale of units | $			$ 257,100
Proceeds from issuance of preferred units | $						$ 40,000
Amount of redemption of preferred units | $						42,436
Proceeds from issuance of common units | $						$ 262,638
Southern Propane Member
Partners' Capital
Equity issued as part of acquisition (in units) | shares	266,951
Value of equity issued as part of acquisition | $	$ 3,442
Series D Preferred Unit
Partners' Capital
Units issued as in-kind distributions (in units) | shares						110,727
Amount of redemption of preferred units | $		$ 42,436
Lonestar | Series D Preferred Unit
Partners' Capital
Units issued in private placements (in units) | shares				1,818,182
Issuance price (in dollars per unit) | $ / shares				$ 22.00
Proceeds from issuance of preferred units | $				$ 40,000
Common | IPO
Partners' Capital
Number of common units issued to the public | shares		13,750,000	13,750,000
Percentage of ownership interest in partnership		37.70%	37.70%
Total proceeds from sale of units | $		$ 257,100
Class A Common Unit | Lonestar
Partners' Capital
Units issued in private placements (in units) | shares					363,636
Proceeds from issuance of common units | $					$ 8,000
Existing Common Units | Prior to the closing of the IPO
Partners' Capital
Percentage of ownership interest in partnership		19.70%	19.70%
Conversion of units (in units) | shares			(18,213,502)
Unit split ratio		0.89	0.89
Number of common units resulting from unit split | shares			22,677,004
Existing Common Units | After the closing of the IPO
Partners' Capital
Conversion of units (in units) | shares			(4,463,502)
Common units conversion ratio			1
Subordinated | Prior to the closing of the IPO
Partners' Capital
Percentage of ownership interest in partnership		80.30%	80.30%
Conversion of units (in units) | shares			18,213,502
Subordinated | After the closing of the IPO
Partners' Capital
Percentage of ownership interest in partnership			50.00%