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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Number and Cost of Common Stock Shares Repurchased | The number and the cost of common stock shares repurchased during the years ended December 31, 2018, 2017 and 2016, are reflected in the following table (in thousands):
|  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Common stock repurchased (in shares) |  | 5,614 |  |  | 4,046 |  |  | 4,046 |
Common stock repurchased |  | $ | 351,194 |  |  | $ | 196,645 |  |  | $ | 163,614 |
Number and Cost of Employee Stock Plan Repurchases | The number and the cost of employee stock plan repurchases made during the years ended December 31, 2018, 2017 and 2016, are reflected in the following table (in thousands):
|  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Repurchases related to employee stock plans (in shares) |  | 235 |  |  | 408 |  |  | 359 |
Repurchases related to employee stock plans |  | $ | 13,674 |  |  | $ | 20,391 |  |  | $ | 15,170 |
Cash Dividends Declared | The cash dividends declared during the years ended December 31, 2018, 2017 and 2016, are reflected in the following table:
|  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Cash dividends declared per share |  | $ | 1.12 |  |  | $ | .96 |  |  | $ | .88 |

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- Definition Tabular disclosure of the details pertaining to each employee stock ownership plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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