Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Activity for Non-voting Time-vested Restricted Stock

The following table summarizes the activity for non-voting time-vested restricted stock units granted to non-employee directors for the year ended December 31, 2015.


	Share Units		Weighted Average Grant-Date Fair Value		Remaining Average Contractual Life (in years)		Aggregate Value (in thousands)
Outstanding at January 1, 2015		4,488	$	41.19		2.48	$	185

Granted		4,317		21.42
Forfeited		—		—
Vested and released to participants		—		—

Outstanding at December 31, 2015		8,805	$	31.50		2.21	$	277

Non-Voting Time-Vested Restricted Stock Units [Member]

Summary of Activity for Non-voting Time-vested Restricted Stock

The following table summarizes the activity for non-voting time-vested restricted stock units granted to employees for the year ended December 31, 2015.


	Share Units			Weighted Average Grant-Date Fair Value			Remaining Average Contractual Life (in years)		Aggregate Value (in thousands)
Outstanding at January 1, 2015		191,655		$	38.56			2.26	$	7,391

Granted		35,456			30.17
Forfeited		(8,026	)		(22.81	)
Vested and released to participants		(37,610	)		(24.82	)

Outstanding at December 31, 2015		181,475		$	40.47			1.56	$	7,344

Non-Voting Performance Based Restricted Stock Units [Member]

Summary of Activity for Non-voting Time-vested Restricted Stock

The following table summarizes the activity for non-voting performance-based restricted stock units for the year ended December 31, 2015.


	Share Units			Weighted Average Grant-Date Fair Value			Remaining Average Contractual Life (in years)		Aggregate Value (in thousands)
Outstanding at January 1, 2015		394,669		$	30.07			1.78	$	11,878

Granted		152,331			33.41
Forfeited		(10,758	)		(22.81	)
Vested and released to participants		(141,286	)		(23.04	)

Outstanding at December 31, 2015		394,956		$	34.07			1.83	$	13,456