Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of Dividends Declared and Paid

The table below summarizes the regular quarterly dividends declared and paid during the years ended December 31, 2020, 2019, and 2018:

(In thousands, except per share data)	Per Share		Record Date	Payment Date	Total Paid
First Quarter 2018	$	0.55	03/16/18	03/29/18	$	13,858
Second Quarter 2018	0.60		06/04/18	06/15/18	15,127
Third Quarter 2018	0.60		08/31/18	09/14/18	15,129
Fourth Quarter 2018	0.60		11/26/18	12/07/18	15,156
Total 2018	$	2.35			$	59,270
First Quarter 2019	$	0.60	03/08/19	03/22/19	$	14,999
Second Quarter 2019	0.65		06/07/19	06/21/19	16,267
Third Quarter 2019	0.65		09/06/19	09/20/19	16,267
Fourth Quarter 2019	0.65		12/06/19	12/20/19	16,280
Total 2019	$	2.55			$	63,813
First Quarter 2020	$	0.65	03/06/20	03/20/20	$	16,321
Second Quarter 2020	0.65		06/05/20	06/19/20	16,349
Third Quarter 2020	0.75		09/04/20	09/18/20	18,865
Fourth Quarter 2020	0.75		12/04/20	12/18/20	18,866
Total 2020	$	2.80			$	70,401

Schedule of Stock-Based Compensation

Stock-based compensation resulted in charges to operations as follows for the years ended December 31:

(In thousands)	2020		2019		2018
Deferred and restricted stock units	$	14,329	$	14,342	$	12,427
Restricted stock	—		—		590
Stock awards	4,173		1,735		1,048
Stock-based compensation expense	$	18,502	$	16,077	$	14,065

Schedule of Deferred Stock Units Transactions

Transactions in DSUs and RSUs under the 2011 Plan or the 2018 Plan, as applicable, are summarized as follows:

	Number of Shares	Weighted Average Price
Outstanding at December 31, 2017	449,055	$	72.55
Issued	5,354	106.10
Granted	101,650	103.20
Dividend equivalents	8,036	89.66
Forfeited	(9,557)	76.71
Vested	(290,132)	74.83
Outstanding at December 31, 2018	264,406	$	83.84
Issued	6,073	89.82
Granted	252,068	81.07
Dividend equivalents	10,243	89.65
Forfeited	(9,079)	89.67
Vested	(177,563)	69.65
Outstanding at December 31, 2019	346,148	$	87.54
Issued	5,703	97.42
Granted	150,319	97.70
Dividend equivalents	10,042	95.08
Forfeited	(21,856)	91.79
Vested	(155,269)	87.69
Outstanding at December 31, 2020	335,087	$	90.04

Schedule of Stock Awards

Transactions in performance-based stock awards and PSUs under the 2011 Plan or the 2018 Plan, as applicable, are summarized as follows:

	Number of Shares	Stock Price
Outstanding at December 31, 2017	271,819	$	70.29
Issued	5,641	106.10
Granted	111,246	106.10
Dividend equivalents	6,280	90.47
Forfeited	(71,618)	86.65
Vested	(136,000)	64.32
Outstanding at December 31, 2018	187,368	$	91.39
Granted	48,995	78.11
Dividend equivalents	3,658	67.03
Forfeited	(8,459)	106.10
Vested	(102,434)	77.93
Outstanding at December 31, 2019	129,128	$	96.21
Granted	66,029	98.98
Dividend equivalents	3,303	96.54
Forfeited	(73,581)	107.91
Vested	(5,152)	100.46
Outstanding at December 31, 2020	119,727	$	89.92

Schedule of Computation of Basic and Diluted Earnings Per Share

The following reconciliation details the denominator used in the computation of basic and diluted earnings per share for the years ended December 31:

(In thousands)	2020	2019	2018
Weighted average shares outstanding for basic earnings per share	25,134	24,998	25,178
Common stock equivalents pertaining to stock-based awards	121	95	285
Weighted average shares outstanding for diluted earnings per share	25,255	25,093	25,463