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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
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, 2017 and 2016:
(In thousands, except per share data) | Per Share |  | Record Date |  | Payment Date |  | Total Paid
First Quarter 2016 | $ | 0.30 |  |  | 04/01/16 |  | 04/15/16 |  | $ | 7,344 |
Second Quarter 2016 | 0.30 |  |  | 06/06/16 |  | 06/17/16 |  | 7,363 |
Third Quarter 2016 | 0.30 |  |  | 08/19/16 |  | 09/02/16 |  | 7,371 |
Fourth Quarter 2016 | 0.50 |  |  | 11/28/16 |  | 12/09/16 |  | 12,359 |
Total 2016 | $ | 1.40 |  |  |  |  |  |  | $ | 34,437 |
First Quarter 2017 | $ | 0.50 |  |  | 03/06/17 |  | 03/17/17 |  | $ | 12,442 |
Second Quarter 2017 | 0.50 |  |  | 05/19/17 |  | 06/02/17 |  | 12,445 |
Third Quarter 2017 | 0.50 |  |  | 08/18/17 |  | 09/01/17 |  | 12,459 |
Fourth Quarter 2017 | 0.55 |  |  | 11/17/17 |  | 12/01/17 |  | 13,711 |
Total 2017 | $ | 2.05 |  |  |  |  |  |  | $ | 51,057 |
Schedule of Stock-Based Compensation | Stock-based compensation resulted in charges to operations as follows for the years ended December 31:
(In thousands) | 2017 |  | 2016 |  | 2015
Stock options | $ | — |  |  | $ | 444 |  |  | $ | 974 |
Deferred stock units | 10,696 |  |  | 7,830 |  |  | 7,023 |
Restricted stock | 1,191 |  |  | 1,770 |  |  | 1,031 |
Stock awards | 8,149 |  |  | 5,376 |  |  | 5,015 |
Stock-based compensation expense | $ | 20,036 |  |  | $ | 15,420 |  |  | $ | 14,043 |
Schedule of Stock Options | Transactions in stock options under the Equity Plan are summarized as follows:
| Number of Option Shares |  | Weighted Average Exercise Price
Outstanding at December 31, 2014 | 453,331 |  |  | $ | 16.89 |
Exercised | (214,601 | ) |  | 14.48 |
Forfeited | (26,700 | ) |  | 14.30 |
Reduction for special cash dividend | — |  |  | (2.00 | )
Outstanding at December 31, 2015 | 212,030 |  |  | 15.38 |
Exercised | (183,600 | ) |  | 15.10 |
Forfeited | (1,550 | ) |  | 17.17 |
Outstanding at December 31, 2016 | 26,880 |  |  | 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) | 2017 |  | 2016 |  | 2015
Intrinsic value of stock options exercised | $ | 2,340 |  |  | $ | 13,204 |  |  | $ | 9,424 |
Cash receipts from stock options exercised | $ | 450 |  |  | $ | 2,772 |  |  | $ | 3,280 |
Income tax benefits from stock option exercises | $ | 900 |  |  | $ | 4,435 |  |  | $ | 2,885 |
Grant date fair value of stock options vested | $ | — |  |  | $ | 506 |  |  | $ | 1,055 |
Schedule of Deferred Stock Units Transactions | Transactions in DSUs and RSUs under the Equity Plan are summarized as follows:
| Number of Shares |  | Weighted Average Price
Outstanding at December 31, 2014 | 738,288 |  |  | $ | 36.96 |
Issued | 54,982 |  |  | 47.51 |
Granted | 90,184 |  |  | 60.22 |
Dividend equivalents | 20,922 |  |  | 59.94 |
Forfeited | (23,604 | ) |  | 44.78 |
Exercised | (353,259 | ) |  | 32.62 |
Outstanding at December 31, 2015 | 527,513 |  |  | $ | 44.94 |
Issued | 10,742 |  |  | 72.01 |
Granted | 173,097 |  |  | 54.67 |
Dividend equivalents | 9,075 |  |  | 87.01 |
Forfeited | (10,893 | ) |  | 48.98 |
Exercised | (203,087 | ) |  | 43.55 |
Outstanding at December 31, 2016 | 506,447 |  |  | $ | 50.00 |
Issued | 68,340 |  |  | 108.61 |
Granted | 95,079 |  |  | 109.50 |
Dividend equivalents | 9,799 |  |  | 104.12 |
Forfeited | (3,094 | ) |  | 72.96 |
Exercised | (227,516 | ) |  | 40.39 |
Outstanding at December 31, 2017 | 449,055 |  |  | $ | 72.55 |
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):
| 2017 |  | 2016 |  | 2015
Granted | 14,018 |  |  | 17,439 |  |  | 20,558 |
Weighted average stock price | $ | 92.25 |  |  | $ | 74.55 |  |  | $ | 59.32 |
Fair value of stock granted | $ | 1,293 |  |  | $ | 1,300 |  |  | $ | 1,220 |
Schedule of Stock Awards | Transactions in stock awards under the Equity Plan are summarized as follows:
| Number of Shares |  | Stock Price
Outstanding at December 31, 2014 | 272,818 |  |  | $ | 39.03 |
Granted | 96,010 |  |  | 60.29 |
Dividend equivalents | 8,992 |  |  | 59.94 |
Forfeited | (16,534 | ) |  | 60.29 |
Exercised | (98,830 | ) |  | 29.70 |
Outstanding at December 31, 2015 | 262,456 |  |  | $ | 49.36 |
Granted | 86,918 |  |  | 54.47 |
Dividend equivalents | 3,811 |  |  | 88.04 |
Forfeited | (10,832 | ) |  | 53.95 |
Exercised | (109,731 | ) |  | 39.94 |
Outstanding at December 31, 2016 | 232,622 |  |  | $ | 55.60 |
Granted | 103,382 |  |  | 90.36 |
Dividend equivalents | 5,249 |  |  | 104.93 |
Exercised | (69,434 | ) |  | 51.20 |
Outstanding at December 31, 2017 | 271,819 |  |  | $ | 70.29 |
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) | 2017 |  | 2016 |  | 2015
Weighted average shares outstanding for basic earnings per share | 25,020 |  |  | 24,631 |  |  | 24,295 |
Common stock equivalents pertaining to stock-based awards | 355 |  |  | 302 |  |  | 355 |
Weighted average shares outstanding for diluted earnings per share | 25,375 |  |  | 24,933 |  |  | 24,650 |

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