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) (USD $)	9 Months Ended
	Sep. 30, 2014
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Weighted average exercise price units	$ 21.00
Weighted average exercise price units, Granted	$ 25.59
Weighted average exercise price units, Exercised
Weighted average exercise price units, Released from restriction		[1]
Weighted average exercise price units, Cancelled/Expired	$ 21.00
Ending balance, Weighted average exercise price units	$ 22.85
Beginning balance, Weighted average fair value	$ 3.50
Weighted average fair value, Granted	$ 4.96
Weighted average fair value, Exercised
Weighted average fair value, Released from restriction		[1]
Weighted average fair value, Cancelled/Expired	$ 3.52
Ending balance, Weighted average fair value	$ 4.25
Beginning balance, Weighted average exercise price options outstanding	$ 21.00
Weighted average exercise price options outstanding, Granted	$ 25.51
Weighted average exercise price options outstanding, Exercised
Weighted average exercise price options outstanding, Released from restriction		[1]
Weighted average exercise price options outstanding, Cancelled/Expired
Ending balance, Weighted average exercise price options outstanding	$ 22.30
2013 Equity Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Options Outstanding	108,629
Options, Granted	44,000
Options, Exercised
Options, Released from restriction		[1]
Options, Cancelled/Expired
Ending balance, Options Outstanding	152,629
2013 Equity Incentive Plan [Member] | Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Number of units	367,910
Number of units, Granted	238,039
Number of units, Exercised
Number of units, Released from restriction		[1]
Number of units, Cancelled/Expired	(14,000)
Ending balance, Number of units	591,949
2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Weighted average exercise price units	$ 23.44
Weighted average exercise price units, Granted
Weighted average exercise price units, Exercised
Weighted average exercise price units, Released from restriction		[1]
Weighted average exercise price units, Cancelled/Expired	$ 23.21
Ending balance, Weighted average exercise price units	$ 23.45
Beginning balance, Weighted average fair value	$ 3.84
Weighted average fair value, Granted
Weighted average fair value, Exercised
Weighted average fair value, Released from restriction		[1]
Weighted average fair value, Cancelled/Expired	$ 5.48
Ending balance, Weighted average fair value	$ 3.76
Beginning balance, Weighted average exercise price options outstanding	$ 21.86
Weighted average exercise price options outstanding, Granted
Weighted average exercise price options outstanding, Exercised
Weighted average exercise price options outstanding, Released from restriction	$ 24.93	[1]
Weighted average exercise price options outstanding, Cancelled/Expired
Ending balance, Weighted average exercise price options outstanding	$ 23.65
Class O Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ending balance, Number of units	800,000
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	1,622,747
Number of units, Granted
Number of units, Exercised
Number of units, Released from restriction		[1]
Number of units, Cancelled/Expired	(75,454)
Ending balance, Number of units	1,547,293
Class RS Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ending balance, Number of units	100,000
Class RS Units [Member] | 2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Options Outstanding	173,750
Options, Granted
Options, Exercised
Options, Released from restriction	(90,437)	[1]
Options, Cancelled/Expired
Ending balance, Options Outstanding	83,313

[1] This represents Class RS units that upon vesting have converted to Operating Partnership units.