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Share and Unit-Based Plans (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of activity of non-vested stock awards

The following table summarizes the activity of non-vested stock awards during the years ended December 31, 2016, 2015 and 2014:

	2016							2015							2014
	Shares			Weighted Average Grant Date Fair Value				Shares			Weighted Average Grant Date Fair Value				Shares			Weighted Average Grant Date Fair Value
Balance at beginning of year	1,612			$	62.01			9,189			$	59.25			19,001			$	56.77
Granted	—			—				—			—				—			—
Vested	(1,612	)		62.01				(7,577	)		58.67				(9,812	)		54.45
Balance at end of year	—			$	—			1,612			$	62.01			9,189			$	59.25

Summary of activity of non-vested stock units

The following table summarizes the activity of non-vested stock units during the years ended December 31, 2016, 2015 and 2014:

	2016							2015							2014
	Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value
Balance at beginning of year	132,086			$	74.58			144,374			$	59.94			137,318			$	57.24
Granted	85,601			79.22				77,282			86.53				75,309			60.50
Vested	(69,259	)		71.82				(86,761	)		61.29				(68,253	)		55.14
Forfeited	—			—				(2,809	)		86.72				—			—
Balance at end of year	148,428			$	78.53			132,086			$	74.58			144,374			$	59.94

Summary of activity of SARs awards

In connection with the payment of the Special Dividend (See Note 12—Stockholders' Equity), the compensation committ

Summary of activity of non-vested LTIP Units

The following table summarizes the activity of the non-vested LTIP Units during the years ended December 31, 2016, 2015 and 2014:

	2016							2015							2014
	Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value
Balance at beginning of year	56,315			$	73.24			46,695			$	58.89			—			$	—
Granted	480,371			65.00				424,442			74.71				725,908			51.71
Vested	(214,114	)		77.45				(414,822	)		73.13				(679,213	)		51.22
Forfeited	—			—				—			—				—			—
Balance at end of year	322,572			$	58.18			56,315			$	73.24			46,695			$	58.89

Summary of activity of stock options

The following table summarizes the activity of stock options for the years ended December 31, 2016, 2015 and 2014:

	2016							2015							2014
	Options			Weighted Average Exercise Price				Options			Weighted Average Exercise Price				Options			Weighted Average Exercise Price
Balance at beginning of year	10,314			$	58.15			10,068			$	59.57			10,068			$	59.57
Granted	—			—				—			—				—			—
Exercised	—			—				—			—				—			—
Special dividend adjustment	251			56.77				246			58.15				—			—
Balance at end of year	10,565			$	56.77			10,314			$	58.15			10,068			$	59.57

Summary of activity of non-vested phantom stock units

The following table summarizes the activity of the non-vested phantom stock units for the years ended December 31, 2016, 2015 and 2014:

	2016							2015							2014
	Stock Units			Weighted Average Grant Date Fair Value				Stock Units			Weighted Average Grant Date Fair Value				Stock Units			Weighted Average Grant Date Fair Value
Balance at beginning of year	—			$	—			9,269			$	58.35			17,575			$	58.66
Granted	21,088			80.21				13,351			78.72				10,747			65.54
Vested	(15,243	)		79.73				(20,162	)		72.17				(19,053	)		62.69
Forfeited	—			—				(2,458	)		55.62				—			—
Balance at end of year	5,845			$	81.47			—			$	—			9,269			$	58.35

Compensation cost under the share and unit-based plans

The following summarizes the compensation cost under the share and unit-based plans for the years ended December 31, 2016, 2015 and 2014:

	2016				2015				2014
Stock awards	$	20			$	252			$	365
Stock units	6,305				6,041				4,689
LTIP units	32,957				26,622				28,598
Stock options	16				16				16
Phantom stock units	1,231				1,444				1,205
	$	40,529			$	34,375			$	34,873

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Tabular disclosure of the changes in outstanding nonvested Long-Term Incentive Plan ("LTIP") units, stock awards, phantom stock and stock units.

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ References

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

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year.

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