Share-Based Payments (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Expense for Share-Based Payments

For the three months ended March 31, 2018 and 2017, compensation expense related to share-based payments was as follows (in thousands of dollars):

	Three Months Ended March 31,
	2018		2017
Pre-tax	$	8,377	$	6,069
After-tax	$	6,639	$	4,057

Schedule of Changes to the Number of Outstanding RSU's, PSU's, and Restricted Shares

For the three months ended March 31, 2018, changes to the number of outstanding RSU’s, PSU’s, and restricted shares were as follows (shares in thousands):

	Restricted Shares, RSU's and PSU's		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	1,922		$	36.59
Granted	684		$	47.07
Vested	(519	)	$	38.84
Canceled	(94	)	$	41.74
Outstanding at March 31, 2018	1,993		$	39.35