v3.8.0.1

Long-Term Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Assumptions Used for Each Grant

The following table details the assumptions used for each grant based on the year it was granted (dollars in thousands):

		2017				2016				2015
Risk free interest rate			1.49	%			0.99	%			0.86	%
Expected volatility			22.2	%			20.5	%			28.0	%
Aggregate fair value		$	20,400			$	26,600			$	26,500

POP LTIP Units [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Stock Options, RSU and Performance Share Awards

The performance criteria were met for the 2015 – 2017 and 2014 – 2016 performance periods, which resulted in the pool being awarded in January 2018 and 2017, respectively, in the form of common stock and vested POP LTIP Units. See below for details on these performance periods (dollars and units in thousands):

		2015 – 2017				2014 – 2016
Performance pool		$	110,230			$	62,220
Common stock			582				486
Vested POP LTIP Units and LTIP Units			1,170				698
Grant date fair value		$	62.65			$	52.53

Restricted Stock Units (RSUs) [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Stock Options, RSU and Performance Share Awards

Each RSU represents the right to receive one share of common stock of the Parent. The following table summarizes the activity for RSUs for the year ended December 31, 2017 (units in thousands):

		Unvested RSUs				Weighted Average Grant Date Fair Value
Balance at January 1, 2017			1,492			$	40.62
Granted			759				50.76
Vested and distributed			(797	)			41.34
Forfeited			(80	)			44.68
Balance at December 31, 2017			1,374			$	45.57

Operating Partnership Long Term Incentive Plan Units

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Stock Options, RSU and Performance Share Awards

The following table summarizes the activity for LTIP Units for the year ended December 31, 2017 (units in thousands):

		Vested LTIP Units				Unvested LTIP Units				Unvested Weighted Average Grant Date Fair Value
Balance at January 1, 2017			743				1,476			$	40.72
Granted			-				1,041				51.11
Vested LTIP Units			688				(688	)			41.13
Vested POP LTIP Units (1)			698				-			N/A
Conversion to common limited partnership units			(597	)			-			N/A
Balance at December 31, 2017			1,532				1,829			$	46.48

X

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ 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=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

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X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ 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)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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No definition available.

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