Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

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

A summary of activity and weighted average exercise prices related to the NSOs is reflected in the table below.



	Nine Months Ended September 30, 2016
	Shares		Weighted Avg. Exercise Price
Outstanding, beginning of period	1,374,456		$	60.62
Granted	1,359,033		30.41
Forfeited	(220,601	)	40.28
Cancelled	(54,018	)	60.65
Outstanding, end of period	2,458,870		$	45.74
Vested and exercisable, end of period	575,682		$	61.10

Restricted Stock Units Activity

A summary of activity and weighted average fair values related to the RSUs is reflected in the table below.



	Nine Months Ended September 30, 2016
	Shares		Weighted Avg. Fair Value
Outstanding, beginning of period	839,789		$	58.39
Granted	819,301		29.91
Dividend equivalent units granted	25,208		38.17
Vested	(306,564	)	58.43
Dividend equivalent units vested	(5,732	)	41.33
Forfeited	(123,695	)	42.60
Dividend equivalent units forfeited	(2,489	)	39.12
Outstanding and nonvested, end of period (1)	1,245,818		$	40.01

(1) Includes 22,309 RSUs which were granted to foreign employees and which the Company expects to settle in cash. The fair value of these RSUs at September 30, 2016 was not material. These RSUs generally vest over a four year period.

Unrestricted Stock Award Activity

A summary of activity and weighted average fair values related to the unrestricted stock awards is as follows:



	Nine Months Ended September 30, 2016
	Shares		Weighted Avg. Fair Value
Outstanding, beginning of period	—		$	—
Granted	16,898		33.73
Vested	(16,898	)	33.73
Outstanding and nonvested, end of period	—		$	—

Performance-based Units Activity

A summary of activity and weighted average fair values related to the PSUs and Supplemental PSUs is reflected in the table below.



	Nine Months Ended September 30, 2016
	Shares		Weighted Avg. Fair Value
Outstanding, beginning of period	106,964		$	65.50
Granted (1)	295,390		21.26
Dividend equivalent units granted	6,417		39.05
Vested	(55,720	)	65.06
Dividend equivalent units vested	(1,009	)	41.64
Forfeited	(8,096	)	49.85
Dividend equivalent units forfeited	(199	)	39.79
Outstanding and nonvested, end of period	343,747		$	27.66

(1) Represents shares of PSUs for which performance targets have been established and which are deemed granted under U.S. GAAP. Includes 214,416 Supplemental PSUs with an average fair value of $16.13 which was determined using a Monte Carlo simulation model, as further described above.

Unrecognized Compensation Cost, Nonvested Awards

As of September 30, 2016, the Company had not yet recognized compensation cost on nonvested awards as follows (dollars in thousands):



	Unrecognized Compensation Cost		Weighted Average Remaining Recognition Period
Nonvested awards	$	63,589	2.6