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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2018
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, 2018, 2017, and 2016:
(In thousands, except per share data) Per ShareRecord DatePayment DateTotal Paid
First Quarter 2016$0.30 04/01/1604/15/16$7,344 
Second Quarter 20160.30 06/06/1606/17/167,363 
Third Quarter 20160.30 08/19/1609/02/167,371 
Fourth Quarter 20160.50 11/28/1612/09/1612,359 
Total 2016$1.40 $34,437 
First Quarter 2017$0.50 03/06/1703/17/17$12,442 
Second Quarter 20170.50 05/19/1706/02/1712,445 
Third Quarter 20170.50 08/18/1709/01/1712,459 
Fourth Quarter 20170.55 11/17/1712/01/1713,711 
Total 2017$2.05 $51,057 
First Quarter 2018$0.55 03/16/1803/29/18$13,858 
Second Quarter 20180.60 06/04/1806/15/1815,127 
Third Quarter 20180.60 08/31/1809/14/1815,129 
Fourth Quarter 20180.60 11/26/1812/07/1815,156 
Total 2018$2.35 $59,270 
Schedule of Stock-Based Compensation
Stock-based compensation resulted in charges to operations as follows for the years ended December 31:
(In thousands)201820172016
Stock options$— $— $444 
Deferred and restricted stock units12,427 10,696 7,830 
Restricted stock590 1,191 1,770 
Stock awards1,048 8,149 5,376 
Stock-based compensation expense$14,065 $20,036 $15,420 
Schedule of Stock Options Transactions in stock options under the 2011 Plan are summarized as follows:
Number of Option Shares
Weighted Average
Exercise Price
Outstanding at December 31, 2015212,030 $15.38 
Exercised(183,600)15.10 
Forfeited(1,550)17.17 
Outstanding at December 31, 201626,880 17.17 
Exercised(26,180)17.17 
Forfeited(700)17.17 
Outstanding at December 31, 2017— $— 
Exercisable at December 31, 2017— $— 
Schedule Exercise of Stock Options
Additional information for the exercise of stock options is as follows for the years ended December 31:
(In thousands)20172016
Intrinsic value of stock options exercised$2,340 $13,204 
Cash receipts from stock options exercised$450 $2,772 
Income tax benefits from stock option exercises$900 $4,435 
Grant date fair value of stock options vested$— $506 
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 SharesWeighted Average Price
Outstanding at December 31, 2015527,513 $44.94 
Issued10,742 72.01 
Granted173,097 54.67 
Dividend equivalents9,075 87.01 
Forfeited(10,893)48.98 
Vested(203,087)43.55 
Outstanding at December 31, 2016506,447 $50.00 
Issued68,340 108.61 
Granted95,079 109.50 
Dividend equivalents9,799 104.12 
Forfeited(3,094)72.96 
Vested(227,516)40.39 
Outstanding at December 31, 2017449,055 $72.55 
Issued5,354 106.10 
Granted101,650 103.20 
Dividend equivalents8,036 89.66 
Forfeited(9,557)76.71 
Vested(290,132)74.83 
Outstanding at December 31, 2018264,406 $83.84 
Schedule of Restricted Stock Grants Restricted stock grants, which were all made to directors, were as follows (in thousands except share and per share amounts):
201820172016
Granted— 14,018 17,439 
Weighted average stock price$— $92.25 $74.55 
Fair value of stock granted$— $1,293 $1,300 
Schedule of Stock Awards Transactions under the 2011 Plan or the 2018 Plan, as applicable, are summarized as follows:
Number of SharesStock Price
Outstanding at December 31, 2015262,456 $49.36 
Granted86,918 54.47 
Dividend equivalents3,811 88.04 
Forfeited(10,832)53.95 
Vested(109,731)39.94 
Outstanding at December 31, 2016232,622 $55.60 
Granted103,382 90.36 
Dividend equivalents5,249 104.93 
Vested(69,434)51.20 
Outstanding at December 31, 2017271,819 $70.29 
Issued5,641 106.10 
Granted111,246 106.10 
Dividend equivalents6,280 90.47 
Forfeited(71,618)86.65 
Vested(136,000)64.32 
Outstanding at December 31, 2018187,368 $91.39 
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)201820172016
Weighted average shares outstanding for basic earnings per share 25,178 25,020 24,631 
Common stock equivalents pertaining to stock-based awards 285 355 302 
Weighted average shares outstanding for diluted earnings per share 25,463 25,375 24,933