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Stock Options, Restricted Stock and Restricted Stock Units (Tables) | 6 Months Ended
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Jun. 30, 2017
Stock Options, Restricted Stock and Restricted Stock Units [Abstract] |
Schedule of restricted stock and restricted stock units activity |
|  | Number of shares or units |  | Weighted- average Grant price |
Balance, December 31, 2016 |  | 727,100 |  | $ | 97.53 |
Grants |  | 75,140 |  |  | 82.18 |
Vested shares |  | (84,718) |  |  | 66.60 |
Forfeitures |  | (1,204) |  |  | 62.28 |
Balance, June 30, 2017 |  | 716,318 |  | $ | 99.64 |
Schedule of stock option activity and other stock option information |
|  |  |  |  |  | Weighted- |  |  |
|  |  |  |  |  | average |  |  |
|  |  |  | Weighted- |  | remaining |  | Aggregate |
|  | Number of |  | average |  | contractual |  | intrinsic value(1) |
|  | shares |  | exercise price |  | life (years) |  | (in thousands) |
Balance, December 31, 2016 |  | 100,000 |  | $ | 51.95 |  | 4.1 |  | $ | 2,868 |
Grants |  | — |  |  | — |  |  |  |  |  |
Exercises |  | — |  |  | — |  |  |  |  |  |
Forfeitures/Expirations |  | — |  |  | — |  |  |  |  |  |
Balance, June 30, 2017 |  | 100,000 |  | $ | 51.95 |  | 3.6 |  | $ | 4,127 |
Exercisable, June 30, 2017 |  | 100,000 |  | $ | 51.95 |  | 3.6 |  | $ | 4,127 |
| (1) |  | The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the Company’s closing stock price on the respective trading day and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holder had all options been exercised on the respective trading day. The amount of intrinsic value will change based on the fair market value of the Company’s common stock.
Schedule of stock-based compensation expense |
|  | For the three months ended |  | For the six months ended |
|  | June 30, |  | June 30, |
|  | 2016 |  | 2017 |  | 2016 |  | 2017 |
Instruction and educational support |  | $ | (438) |  | $ | 645 |  | $ | 155 |  | $ | 814 |
Marketing |  |  | — |  |  | — |  |  | — |  |  | — |
Admissions advisory |  |  | — |  |  | — |  |  | — |  |  | — |
General and administration |  |  | 2,474 |  |  | 2,583 |  |  | 4,771 |  |  | 4,840 |
Stock-based compensation expense included in operating expense |  |  | 2,036 |  |  | 3,228 |  |  | 4,926 |  |  | 5,654 |
Tax benefit |  |  | 802 |  |  | 1,275 |  |  | 1,900 |  |  | 2,233 |
Stock-based compensation expense, net of tax |  | $ | 1,234 |  | $ | 1,953 |  | $ | 3,026 |  | $ | 3,421 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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