Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

A summary of restricted stock and restricted stock unit activity and changes during the year ended December 31, 2016 is presented below:



Restricted Stock and Restricted Stock Units	Grants		Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value ($000)

Outstanding at January 1, 2016 (non-vested)	722,525		$	47.50
Granted	894,879		21.66
Vesting (transfer/conversion to common stock)	(409,016	)	45.09
Forfeited	(19,614	)	48.02
Outstanding at December 31, 2016 (non-vested)	1,188,774		$	28.87	$	37,426

A summary of performance share unit activity and changes during the year ended December 31, 2016 is presented below:



Performance Share Units	Grants

Outstanding at January 1, 2016 (non-vested)	637,938
Granted	376,275
Vesting and transfer of ownership to recipients	(161,610	)
Forfeited	(148,664	)
Outstanding at December 31, 2016 (non-vested)	703,939