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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 13, 2018 | Feb. 27, 2018 | Mar. 31, 2018 | Mar. 31, 2017 | Feb. 25, 2016
Common stock dividends paid |  |  | $ 59,400,000 | $ 59,400,000 |
Dividends paid per common share (in dollars per share) |  | $ 0.63 |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 200,000,000
Repurchases of common stock under stock repurchase program |  |  | 0 |  |
Common stock repurchase authorization amount available |  |  | $ 193,000,000 |  |
Subsequent Event |  |  |  |  |
Common stock dividends paid | $ 59,400,000 |  |  |  |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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