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Treasury and Preferred Stock | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Treasury and Preferred Stock | Treasury and Preferred Stock The Company has executed share repurchases against authorization approved by the Board of Directors in 2014 and 2016. In 2017, the Company repurchased $130 million of stock under these authorizations and as of December 31, 2017, the remaining authorization was $110 million. Treasury stock activity for the years ended December 31, 2017, 2016 and 2015, was as follows:
(Shares in thousands) | 2017 |  | 2016 |  | 2015
Balance at January 1 | 13,221 |  |  | 11,725 |  |  | 9,844 |
Compensation plans and other | (547 | ) |  | (1,199 | ) |  | (458 | )
Share repurchases | 2,327 |  |  | 2,695 |  |  | 2,339 |
Balance at December 31 | 15,001 |  |  | 13,221 |  |  | 11,725 |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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