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Shareholders' Equity
 3 Months Ended
Mar. 31, 2017
Shareholders’ Equity [Abstract]  
Shareholders' Equity

4. Shareholders’ Equity

On January 10, 2017, the Company announced that its Board of Directors authorized the expenditure of up to an additional $100,000 to repurchase shares of common stock, bringing the aggregate authorized amount to $2.2 billion. Under the remaining repurchase authorizations, shares may be purchased from time to time in open market transactions, subject to market conditions.

During the three months ended March 31, 2017, the Company repurchased 141 shares of common stock under authorized programs, for a total cost of $57,959. The cumulative shares repurchased under authorized programs as of March 31, 2017, were 7,004 for a total cost of $2,055,767. As of March 31, 2017, $144,613 was available to repurchase shares under the current repurchase authorizations.  Shares repurchased are being held in treasury stock until they are reissued or retired at the discretion of the Board of Directors.