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Shareholders' Equity | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Shareholders' Equity | SHAREHOLDERS' EQUITY Since the inception of the Company's stock repurchase plan in 2004 through December 31, 2017, the Company's Board of Directors has authorized the repurchase of $700,000,000 of the Company's common stock. As of December 31, 2017, the Company had repurchased 21,658,035 shares under this program at an aggregate purchase price of approximately $562,064,000. During the year ended December 31, 2017, the Company purchased an aggregate of $35,542,000 of common stock under the stock repurchase plan. Shares of the Company's common stock may be purchased in the open market or through privately negotiated transactions, subject to market conditions. The repurchase program does not obligate the Company to acquire any specific number of shares or to acquire shares over any specified period of time.

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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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