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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Restricted Stock Unit Awards

The activity related to our Company's restricted stock unit awards was as follows:

		Three Months Ended March 31, 2019
		Number of Awards				Weighted Average Grant Date Fair Value ⁽¹⁾
Nonvested at the beginning of the period			86,589			$	49.45
Granted			191,713				69.76
Vested ⁽²⁾			(14,849	)			46.51
Forfeited			(8,250	)			48.74
Nonvested at the end of the period			255,203			$	64.90

(1)	Fair value is based on the closing price of our common shares on the NASDAQ on the grant date.

(2)	This amount represents the gross number of shares vested before any share forfeiture to pay required tax withholdings. For the three months ended March 31, 2019 share awards of 6,043 were withheld for tax payments at a weighted average vest date fair value of $69.62.

Performance-based Equity Awards

The activity related to our Company's performance-based equity awards was as follows:

		Three Months Ended March 31, 2019
		Number of Awards				Weighted Average Grant Date Fair Value ⁽¹⁾
Nonvested at the beginning of the period			845,533			$	48.86
Granted			—				—
Performance Adjustment			(96,448	)			40.57
Vested ⁽²⁾			(247,448	)			40.70
Forfeited			(27,000	)			51.27
Nonvested at the end of the period			474,637			$	54.66

(1)	Fair value is based on the closing price of our common shares on the NASDAQ on the grant date.

(2)	This amount represents the gross number of shares vested before any share forfeiture to pay required tax withholdings. For the three months ended March 31, 2019 share awards of 98,558 were withheld for tax payments at a weighted average vest date fair value of $69.78.