Number of Vesting Installments

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Percentage After Five Years

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Percentage After Four Years

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Percentage After Three Years

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Look-Back Period

+ References

No definition available.

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- Definition

Share-based Payment Arrangement by Share-based Payment Award, Equity Other than Options, Vesting Threshold, Age of Grantee

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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

+ References

+ Details

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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- Definition

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).

+ References

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

+ Details

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

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

+ References

+ Details

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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Equity - Incentive and Share-Based Compensation (Details) $ / shares in Units, $ in Millions	1 Months Ended			3 Months Ended
	Mar. 31, 2017 USD ($) vesting_installment $ / shares shares	Jun. 30, 2016 USD ($) shares	Feb. 29, 2016 USD ($) vesting_installment shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate look-back period (in years)				6 years
Weighted Average Grant Fair Value [Roll Forward]
Beginning balance, Unvested, Weighted Average Grant Fair Value (in USD per share) \| $ / shares				$ 10.01
Vested, Weighted Average Grant Fair Value (in USD per share) \| $ / shares				13.19
Granted, Weighted Average Grant Fair Value (in USD per share) \| $ / shares				13.55
Forfeited or unearned, Weighted Average Grant Fair Value (in USD per share) \| $ / shares				14.87
Ending balance, Unvested, Weighted Average Grant Fair Value (in USD per share) \| $ / shares	$ 10.89			$ 10.89
Age of grantee at which LTIP unit and restricted stock awards immediately vest				60 years
Period of service, upon completion of which, grantee's LTIP unit and restricted stock awards will immediately vest				10 years
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the plan	12,200,000.0			12,200,000.0
Number of shares that remain available for future issuance	7,000,000			7,000,000
Long-Term Incentive Plan Unit and Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $				$ 18.4	$ 17.5
Expected term				2 years 9 months 18 days	2 years 9 months 18 days
Dividend rate				2.05%	2.10%
Risk-free interest rate				1.55%	0.84%
Expected price volatility				20.00%	24.00%
Weighted Average Grant Fair Value [Roll Forward]
Granted, Weighted Average Grant Fair Value (in USD per share) \| $ / shares				$ 13.55	$ 9.38
Long-Term Incentive Plan Unit
Restricted Stock and LTIP Unit Activity [Roll Forward]
Beginning balance, Unvested (in shares)				2,881,629
Vested (in shares)				(271,136)
Granted (in shares)				1,322,166
Forfeited or unearned (in shares)				(77,227)
Ending balance, Unvested (in shares)	3,855,432			3,855,432
Time Based Long-Tern Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $	$ 1.6		$ 1.4	$ 0.1
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)	47,993		47,168
Performance Based Long-Term Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $	$ 1.0		$ 0.8
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)	95,156		112,925
Restricted Stock
Restricted Stock and LTIP Unit Activity [Roll Forward]
Beginning balance, Unvested (in shares)				107,793
Vested (in shares)				(16,577)
Granted (in shares)				34,407
Forfeited or unearned (in shares)				(1,404)
Ending balance, Unvested (in shares)	124,219			124,219
Time Restricted Shares
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)	34,407		44,198
Awards that Meet Age and Service Requirements for Vesting
Weighted Average Grant Fair Value [Roll Forward]
Noncash share-based compensation expense recognized \| $				$ 0.6	$ 0.4
Unrecognized compensation expense \| $	$ 1.2			$ 1.2
Unrecognized compensation expense, period for recognition (in years)				2 years 8 months 18 days
Awards that Do Not Meet Age and Service Requirements for Vesting
Weighted Average Grant Fair Value [Roll Forward]
Noncash share-based compensation expense recognized \| $				$ 2.6	$ 1.7
Unrecognized compensation expense \| $	32.9			$ 32.9
Unrecognized compensation expense, period for recognition (in years)				2 years 10 months 18 days
Executive Officer \| 2013 Plan Units Vesting January 2019 \| Time Based Long-Tern Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $			$ 5.6
Award vesting period (in years)			4 years
Number of vesting installments (tranche) \| vesting_installment			3
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)			368,225
Executive Officer \| 2013 Plan Units Vesting January 2019 \| Performance Based Long-Term Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $			$ 8.8
Award vesting period (in years)			3 years
Number of vesting installments (tranche) \| vesting_installment			2
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)			1,230,228
Executive Officer \| 2013 Plan Units Vesting three years after February 2016 \| Time Based Long-Tern Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $			$ 1.0
Award vesting percentage after three years				30.00%
Award vesting percentage after four years				30.00%
Award vesting percentage after five years				40.00%
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)			62,814
Executive Officer \| 2013 Plan Units, granted in March 2017 \| Time Based Long-Tern Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $	$ 6.1
Award vesting period (in years)	4 years
Number of vesting installments (tranche) \| vesting_installment	3
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)	313,275
Executive Officer \| 2013 Plan Units, granted in March 2017 \| Performance Based Long-Term Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $	$ 9.6
Award vesting period (in years)	3 years
Number of vesting installments (tranche) \| vesting_installment	2
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)	865,742
Director \| 2013 Plan Units Vesting three years after June 2016 \| Time Based Long-Tern Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based awards granted in period \| $		$ 0.8
Award vesting period (in years)		3 years
Restricted Stock and LTIP Unit Activity [Roll Forward]
Granted (in shares)		43,257