Partners' Capital, Equity and Incentive Compensation Plans (Summary of Award Activity Under 2010 Equity Incentive Plan and 2013 Equity Incentive Plan and Related Information) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Weighted average exercise price units	$ 33.82	$ 29.13	$ 21.00
Weighted average exercise price units, Granted	45.53	36.71	32.66
Weighted average exercise price units, Exercised	33.26	28.37	21.00
Weighted average exercise price units, Cancelled/Expired	33.92	28.33	21.00
Ending balance, Weighted average exercise price units	40.67	33.82	29.13
Beginning balance, Weighted average fair value	5.56	4.10	3.50
Weighted average fair value, Granted	9.91	8.03	4.96
Weighted average fair value, Exercised	4.96	3.63	3.52
Weighted average fair value, Cancelled/Expired	6.95	3.52	3.52
Ending balance, Weighted average fair value	6.51	5.56	4.10
Beginning balance, Weighted average exercise price options outstanding	27.80	22.87	21.00
Weighted average exercise price options outstanding, Granted	45.78	36.16	25.59
Weighted average exercise price options outstanding, Exercised	25.70	21.30	21.00
Weighted average exercise price options outstanding, Cancelled/Expired	32.14	21.00	21.00
Ending balance, Weighted average exercise price options outstanding	$ 31.72	$ 27.80	$ 22.87
2013 Equity Incentive Plan [Member] | Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Options Outstanding (in shares)	867,882	584,949	367,910
Options, Granted (in shares)	229,693	317,497	238,039
Options, Exercised (in shares)	(29,543)	(23,157)	(3,000)
Options, Cancelled/Expired (in shares)	(9,735)	(11,407)	(18,000)
Ending balance, Options Outstanding (in shares)	1,058,297	867,882	584,949
2013 Equity Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Number of units (in shares)	394,908	246,785	108,629
Number of units, Granted (in shares)	237,563	230,271	172,102
Number of units, Exercised	(122,136)	(54,400)	(25,786)
Number of units, Cancelled/Expired (in shares)	(95,644)	(27,748)	(8,160)
Ending balance, Number of units (in shares)	414,691	394,908	246,785
2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Weighted average fair value	$ 3.68	$ 3.75	$ 3.84
Weighted average fair value, Exercised	4.18	4.18	4.75
Weighted average fair value, Cancelled/Expired		3.92	5.23
Ending balance, Weighted average fair value	$ 3.62	$ 3.68	$ 3.75
Class O Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ending balance, Number of units (in shares)	100,000
Class O Units [Member] | 2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Number of units (in shares)	1,292,899	1,518,717	1,622,747
Number of units, Exercised	(158,088)	(222,499)	(15,750)
Number of units, Cancelled/Expired (in shares)		(3,319)	(88,280)
Ending balance, Number of units (in shares)	1,134,811	1,292,899	1,518,717
Beginning balance, Weighted average exercise price units	$ 23.76	$ 23.49	$ 23.44
Weighted average exercise price units, Exercised	21.56	22.02	20.71
Weighted average exercise price units, Cancelled/Expired		20.00	23.01
Ending balance, Weighted average exercise price units	$ 24.06	$ 23.76	$ 23.49
Class RS Units [Member] | 2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Number of units (in shares)	39,875	74,625	173,750
Number of units, Released from restriction (in shares)	(39,875)	(34,750)	(99,125)
Ending balance, Number of units (in shares)		39,875	74,625
Beginning balance, Weighted average exercise price units	$ 22.18	$ 23.49	$ 24.31
Weighted average exercise price units, Released from restriction	$ 22.18	25.00	24.94
Ending balance, Weighted average exercise price units		$ 22.18	$ 23.49