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Stockholders' Equity | 6 Months Ended
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Jun. 30, 2018
Stockholders' Equity Note [Abstract] |
Stockholders' Equity | Stockholders' Equity Stock Repurchase Program In June 2015, our Board of Directors authorized, subject to regulatory approval, a repurchase of shares of our Class A Common Stock in an amount up to $150 million under a stock repurchase program with no expiration date. As of November 2017, we have repurchased all $150 million of Class A common stock under the repurchase program. Accelerated Share Repurchases We have entered into accelerated share repurchase arrangements (“ASRs”) with a financial institution from time to time under our stock repurchase program. The following table summarizes our ASR activity for the prior year comparative period:
| Purchase Period End Date |  | Number of Shares (In thousands) |  | Average Repurchase Price Per Share |  | ASR Amount (In thousands) |
March 2017 ASR | November 2017 |  | 1,326 |  |  | $ | 38.64 |  |  | $ | 50,000 |  | (1)
(1) | We elected to cash settle approximately $2.0 million worth of shares owed back to the counterparty under our March 2017 accelerated share repurchase agreement.
In exchange for an up-front payment in March 2017, the financial institution delivered 1.3 million shares of our Class A common stock. The up-front payments are accounted for as a reduction to shareholders’ equity on our consolidated balance sheets in the periods the payments are made. The ASRs are accounted for in two separate transactions: 1) a treasury stock repurchase for the initial shares received and 2) a forward stock purchase contract indexed to our own stock for the unsettled portion of the ASR. The par value of the shares received are recorded as a reduction to common stock with the remainder recorded as a reduction to additional paid-in capital and retained earnings. The ASRs meet all of the applicable criteria for equity classification, and therefore are not accounted for as derivative instruments. The initial repurchase of shares result in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted earnings per share. The final number of shares received upon settlement for the ASR is determined based on the volume-weighted average price of our common stock over the term of the agreement less an agreed upon discount and subject to adjustments pursuant to the terms and conditions of the ASR. The shares received are retired in the periods they are delivered, but remain authorized for registration and issuance in the future.

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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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