Share-Based Plans (Tables)

12 Months Ended

Dec. 31, 2017

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

Schedule of Allocation of Stock-based Compensation Expense and Related Tax Benefit

The following table provides a summary of stock compensation expense and income tax benefits associated with stock compensation recognized in the accompanying Consolidated Statements of Income:

	Years ended December 31,
(In thousands)	2017		2016		2015
Stock options	$	—	$	43	$	379
Restricted stock	12,276		11,395		10,556
Total stock compensation expense	$	12,276	$	11,438	$	10,935
Income tax benefit (1)	$	11,849	$	4,132	$	3,903

(1)

The income tax benefit in 2017 includes $7.1 million of excess tax benefits recognized under ASU No. 2016-09, Compensation - Stock Compensation (Topic 718) - Improvements to Employee Share Based Payment Accounting, which the Company adopted effective January 1, 2017.

Summary of Restricted Stock and Stock Option Activity

The following table provides a summary of the activity under the stock compensation plans for the year ended December 31, 2017:

	Unvested Restricted Stock Awards									Stock Options Outstanding
	Time-Based						Performance-Based
	Number of Shares	Weighted-Average Grant Date Fair Value		Number of Units	Weighted-Average Grant Date Fair Value		Number of Shares	Weighted-Average Grant Date Fair Value		Number  of Shares	Weighted-Average Exercise Price
Balance at January 1, 2017	253,361	$	32.24	2,158	$	32.89	116,184	$	33.62	1,072,974	$	21.24
Granted	168,369	54.76		8,129	56.07		89,581	56.18		—	—
Exercised options	—	—		—	—		—	—		399,935	25.42
Vested restricted stock awards (1)	194,986	37.16		10,287	51.21		117,695	42.09		—	—
Forfeited	18,944	35.58		—	—		9,154	43.10		—	—
Balance at December 31, 2017	207,800	$	43.16	—	$	—	78,916	$	45.35	673,039	$	18.75

(1)

Vested for purposes of recording compensation expense.

Summary of Options Outstanding and Options Exercisable

The following table summarizes information for options, all of which are both outstanding and exercisable, at December 31, 2017:

Range of Exercise Prices	Number of Shares	Weighted-Average Remaining Contractual Life (years)	Weighted-Average Exercise Price
$ 5.14 - 12.85	222,947	1.2	$	9.43
$ 22.04 - 25.15	450,092	4.5	23.37
	673,039	3.4	$	18.75