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Stock Options, Restricted Stock and Restricted Stock Units (Tables) | 12 Months Ended
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Dec. 31, 2015
Stock Options, Restricted Stock and Restricted Stock Units [Abstract] |
Schedule of restricted stock and restricted stock units activity |
|  |  | Number of shares |  |  |  | Weighted-average grant price
Balance, December 31, 2012 |  |  | 434,439 |  |  |  |  | $ | 178.88
Grants |  |  | 225,741 |  |  |  |  |  | 57.90
Vested shares |  |  | (51,916 | ) |  |  |  |  | 164.22
Forfeitures |  |  | (120,491 | ) |  |  |  |  | 140.30
Balance, December 31, 2013 |  |  | 487,773 |  |  |  |  | $ | 131.51
Grants |  |  | 108,606 |  |  |  |  |  | 38.95
Vested shares |  |  | (69,434 | ) |  |  |  |  | 158.97
Forfeitures |  |  | (2,729 | ) |  |  |  |  | 93.44
Balance, December 31, 2014 |  |  | 524,216 |  |  |  |  | $ | 115.67
Grants |  |  | 126,655 |  |  |  |  |  | 61.00
Vested shares |  |  | (13,725 | ) |  |  |  |  | 52.94
Forfeitures |  |  | (2,819 | ) |  |  |  |  | 115.55
Balance, December 31, 2015 |  |  | 634,327 |  |  |  |  | $ | 104.66
Schedule of stock option activity and other stock option information |
|  | Number of shares |  |  |  | Weighted-average exercise price |  |  |  | Weighted- average remaining contractual life (years) |  |  |  | Aggregate intrinsic value(1) (in thousands)
Balance, December 31, 2012 |  | 100,000 |  |  |  |  | $ | 107.28 |  |  |  | 0.1 |  |  |  | $ | —
Grants |  | 100,000 |  |  |  |  |  | 51.95 |  |  |  |  |  |  |  |  |
Exercises |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeitures |  | (100,000 | ) |  |  |  |  | 107.28 |  |  |  |  |  |  |  |  |
Balance, December 31, 2013 |  | 100,000 |  |  |  |  | $ | 51.95 |  |  |  | 7.0 |  |  |  | $ | —
Grants |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Exercises |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeitures |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Balance, December 31, 2014 |  | 100,000 |  |  |  |  | $ | 51.95 |  |  |  | 6.0 |  |  |  | $ | 2,233
Grants |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Exercises |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeitures/Expirations |  | — |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Balance, December 31, 2015 |  | 100,000 |  |  |  |  | $ | 51.95 |  |  |  | 5.1 |  |  |  | $ | 817
Exercisable, December 31, 2015 |  | 100,000 |  |  |  |  | $ | 51.95 |  |  |  | 5.1 |  |  |  | $ | 817
____________ (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.
Summary of number of shares exercisable |
|  | Number of shares |  |  | Weighted- average exercise price |
Exercisable, December 31, 2013 |  |  | - |  |  | $ | 51.95 |
Exercisable, December 31, 2014 |  |  | - |  |  | $ | 51.95 |
Exercisable, December 31, 2015 |  |  | 100,000 |  |  | $ | 51.95 |
Schedule of stock-based compensation expense |
|  | 2013 |  |  | 2014 |  |  | 2015 |
Instruction and educational support |  | $ | 1,976 |  |  | $ | 1,736 |  |  | $ | 2,134 |
Marketing |  |  | – |  |  |  | – |  |  |  | – |
Admissions advisory |  |  | – |  |  |  | – |  |  |  | – |
General and administration |  |  | 7,315 |  |  |  | 7,717 |  |  |  | 8,079 |
Stock-based compensation expense included in operating expense |  |  | 9,291 |  |  |  | 9,453 |  |  |  | 10,213 |
Tax benefit |  |  | 3,698 |  |  |  | 3,734 |  |  |  | 4,032 |
Stock-based compensation expense, net of tax |  | $ | 5,593 |  |  | $ | 5,719 |  |  | $ | 6,181
Schedule of information regarding share-based payment arrangements |
|  |  |  | 2013 |  |  |  | 2014 |  |  |  | 2015
Proceeds from stock options exercised |  |  |  | $ | — |  |  |  |  | $ | — |  |  |  |  | $ | — |
Tax shortfall related to share-based payment arrangements |  |  |  | $ | (3,567 | ) |  |  |  | $ | (2,039 | ) |  |  |  | $ | (24 | )
Intrinsic value of stock options exercised |  |  |  | $ | — |  |  |  |  | $ | — |  |  |  |  | $ | — |

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