Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Stock-Based Compensation

Summary of the Company's restricted stock activity

		Weighted Average		Aggregate
	Shares	Grant Date Fair Value		Intrinsic Value
December 31, 2016	919,193	$	22.73
Granted	320,018		51.60
Vested	(328,253)		47.06
Forfeited	(11,484)		44.57
December 31, 2017	899,474	$	46.59	$	43.0