Stock-Based Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2017

Restricted Stock

Stock-Based Compensation

Schedule of unvested restricted stock unit activity

The following table summarizes changes to the Company’s unvested RSUs for the six months ended June 30, 2017: 

	Shares		Weighted- Average Price		Aggregate Intrinsic Value *
Unvested Restricted Stock Units (RSUs)	(in thousands)				(in thousands)
Outstanding at January 1, 2017	615		$	31.81	26,915
Awarded	616
Vested	(327	)
Forfeited	(20	)
Outstanding at June 30, 2017	884		$	36.95	$	38,645
Outstanding and expected to vest at June 30, 2017	861		$	36.91	$	37,643

* The intrinsic value is calculated using the closing price per share of $43.71 of the underlying Company's common stock as reported by the New York Stock Exchange on June 30, 2017.

Non-Qualified Stock Options

Stock-Based Compensation

Summary of stock option activity

The following table summarizes the changes to the Company’s outstanding non-qualified stock options for the six months ended June 30, 2017: 

	Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Aggregate Intrinsic Value *
Non-Qualified Stock Options	(in thousands)				(in years)	(in thousands)
Outstanding at January 1, 2017	251		$	29.66	1.1	3,558
Exercised	(44	)
Forfeited	—
Outstanding and exercisable at June 30, 2017	207		$	29.66	0.6	$	2,913

* The intrinsic value represents the amount, if any, by which the fair market value of the underlying Company's common stock exceeds the exercise price of the stock option, using the closing price per share of $43.71 such stock as reported by the New York Stock Exchange on June 30, 2017.