Consolidated Statements of Partners’ Capital and Comprehensive Income Statement - 6 months ended Jun. 30, 2016 - USD ($)	Total	Limited Partners Capital Account Subordinated Units Affiliates [Member]	Partner Capital Common Units And Subordinated Units [Member]	Incentive Distributions Rights	Noncontrolling Interest	Common units-public
Balance at December 31, 2015 at Dec. 31, 2015						25,585,000
Balance at December 31, 2015 at Dec. 31, 2015	$ 268,856,000	$ (105,467,000)			$ (135,000)	$ 374,458,000
Balance at December 31, 2015 at Dec. 31, 2015		7,525,000
Net income and comprehensive income	5,399,000	$ 266,000		$ 1,579,000	6,000	3,548,000
Distributions paid	$ (41,192,000)	$ (4,459,000)		$ (1,579,000)	(61,000)	$ (35,093,000)
Repurchase of common units	(133,463)					133,000
Repurchase of common units	$ (3,253,000)					$ (3,252,653)
Partners' Capital Account, Units, Converted		(7,525,000)				7,525,000
Conversion of subordinated units	0	$ 109,660,000				$ (109,660,000)
Distribution to CST in connection with the purchase of dealer contracts	(2,900,000)					$ (2,900,000)
Issuance of units to CST for the payment of management fees						228,000
Issuance of units to CST for the payment of management fees	5,255,000					$ 5,255,000
Issuance of units for vesting of equity based award and profits interests						95,000
Issuance of units for vesting of equity based award and profits interests	2,281,000					$ 2,281,000
Other	(427,000)					$ (427,000)
Balance at June 30, 2016 at Jun. 30, 2016						33,300,000
Balance at June 30, 2016 at Jun. 30, 2016	$ 234,019,000		$ 0		$ (190,000)	$ 234,209,000
Balance at June 30, 2016 at Jun. 30, 2016		0