Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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.



	Three Months Ended March 31, 2016
	Shares		Weighted Avg. Exercise Price
Outstanding, beginning of period	1,374,456		$	60.62
Granted	1,241,354		29.22
Forfeited	(44,240	)	43.26
Cancelled	(9,112	)	58.44
Outstanding, end of period	2,562,458		$	45.71
Vested and exercisable, end of period	605,559		$	61.11

Restricted Stock Units Activity

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



	Three Months Ended March 31, 2016
	Shares		Weighted Avg. Fair Value
Outstanding, beginning of period	839,789		$	58.39
Granted	764,973		29.31
Dividend equivalent units granted	9,044		35.95
Vested	(277,580	)	58.38
Dividend equivalent units vested	(4,993	)	41.64
Forfeited	(21,264	)	47.29
Dividend equivalent units forfeited	(332	)	39.72
Outstanding and nonvested, end of period (1)	1,309,637		$	41.51

(1) Includes 19,954 RSUs which were granted to foreign employees and which the Company expects to settle in cash. The fair value of these RSUs at March 31, 2016 was not material. These RSUs generally vest over a four year period.

Restricted Stock Award And Unrestricted Stock Award Activity

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



	Three Months Ended March 31, 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 is reflected in the table below.



	Three Months Ended March 31, 2016
	Shares		Weighted Avg. Fair Value
Outstanding, beginning of period	106,964		$	65.50
Granted (1)	34,728		30.96
Dividend equivalent units granted	734		36.19
Vested	(55,720	)	65.06
Dividend equivalent units vested	(1,009	)	41.64
Forfeited	(948	)	65.06
Outstanding and nonvested, end of period	84,749		$	42.79

(1) Represents shares of PSUs for which performance targets have been established and which are deemed granted under U.S. GAAP.

Unrecognized Compensation Cost, Nonvested Awards

As of March 31, 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	$	81,291	3.1