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Shareholders' Equity | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Shareholders' Equity | Shareholders’ Equity A summary of changes in shareholders’ equity is presented below:
|  | Common Stock |  | Additional Paid-In Capital |  | Retained Earnings |  | Treasury Stock |  | Deferred Compensation Trust |  | Deferred Compensation Liability |  | Total
Balance, December 31, 2017 |  | $ | 206 |  |  | $ | 1,644,197 |  |  | $ | 6,231,940 |  |  | $ | (6,270,851 | ) |  | $ | (17,383 | ) |  | $ | 17,383 |  |  | $ | 1,605,492 |
Cumulative-effect adjustment from adoption of ASU 2014-09, net of tax |  | — |  |  | — |  |  | 2,196 |  |  | — |  |  | — |  |  | — |  |  | 2,196 |
Net income |  | — |  |  | — |  |  | 166,049 |  |  | — |  |  | — |  |  | — |  |  | 166,049 |
Deferred compensation activity |  | — |  |  | — |  |  | — |  |  | — |  |  | (6 | ) |  | 6 |  |  | — |
Purchase of common stock for treasury |  | — |  |  | — |  |  | — |  |  | (357,242 | ) |  | — |  |  | — |  |  | (357,242 | )
Equity-based compensation |  | — |  |  | 9,509 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 9,509 |
Proceeds from stock options exercised |  | — |  |  | 40,804 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 40,804 |
Treasury stock issued upon option exercise and restricted share vesting |  | — |  |  | (16,410 | ) |  | — |  |  | 16,410 |  |  | — |  |  | — |  |  | — |
Balance, March 31, 2018 |  | $ | 206 |  |  | $ | 1,678,100 |  |  | $ | 6,400,185 |  |  | $ | (6,611,683 | ) |  | $ | (17,389 | ) |  | $ | 17,389 |  |  | $ | 1,466,808 |
The Company repurchased approximately 116 shares of its common stock during the three months ended March 31, 2018. The Company settles stock option exercises and vesting of restricted share units by issuing shares of treasury stock. Approximately 44 shares were issued from the treasury account during the three months ended March 31, 2018 in settlement of stock option exercises and vesting of restricted share units. Shares are relieved from the treasury account based on the weighted average cost basis of treasury shares acquired.

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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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