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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Amount of cash paid related to share-based compensation liabilities.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Gross number of share options (or share units) granted during the period.

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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Number of share options (or share units) exercised during the current period.

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Unit Based Compensation (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
Unit Based Compensation (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash settled restricted unit-based compensation awards			$ 210,434		$ 210,434		$ 150,281
Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted	$ 1,600	$ 2,400
Common units, granted	321,318	601,368
Vesting period from grant date					3 years
Common units, vested					255,370	76,637
Common units, value					$ 2,200	$ 2,000
Common units issued to grantees					83,060	25,286
Amount paid to grantees in cash					$ 600	$ 200
Restricted stock or unit expense			100	$ 300	700	$ 1,900
Cash settled restricted unit-based compensation awards			500		500		$ 1,100
Non-vested awards not yet recognized			$ 1,300		$ 1,300
Expected weighted average period of non-vested awards not yet recognized					1 year
Non-Management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units, granted					56,950
Common units aggregate value, granted					$ 300