| Equity [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Equity [Abstract] | |
Noncontrolling Interest | The following table summarizes the activity that relates to the Company’s noncontrolling interest as reflected in the consolidated statements of operations for the years ended December 31, 2016, 2015 and 2014 (in thousands): | | | | | | | | | | | | | | For the Years Ended December 31, | | 2016 | | 2015 | | 2014 | Preferred income allocated to Series C convertible units | $ | 3,027 |
| | $ | 18,792 |
| | $ | 18,600 |
| Net loss allocated to Class A units | (6,417 | ) | | (4,282 | ) | | (3,372 | ) | Net income allocated to Series D convertible units | 134 |
| | — |
| | — |
| Beneficial conversion feature related to conversion of Series D and E units | 7,569 |
| | — |
| | — |
| Net loss allocated to noncontrolling interests in certain consolidated subsidiaries | (562 | ) | | (157 | ) | | (263 | ) | Total noncontrolling interest | $ | 3,751 |
| | $ | 14,353 |
| | $ | 14,965 |
|
|
Summary of Stock Option Activity Under Plan | The following table summarizes stock option activity under the Plan for the years ended December 31, 2016, 2015 and 2014: | | | | | | | | | | | | | | | Shares | | Weighted- Average Exercise Price | | Weighted- Average Remaining Contractual Life (in years) | | Aggregate Intrinsic Value (1) (in thousands) | Options outstanding at December 31, 2013 | 1,190,000 |
| | $ | 15.48 |
| | 9.3 | | $ | 862 |
| Granted | 1,270,000 |
| | 16.74 |
| | | | |
| Exercised | (28,750 | ) | | 15.00 |
| | | | 74 |
| Forfeited | (266,250 | ) | | 15.88 |
| | | | |
| Options outstanding at December 31, 2014 | 2,165,000 |
| | $ | 16.17 |
| | 8.8 | | $ | 1,890 |
| Granted | 588,500 |
| | 16.49 |
| | | | |
| Exercised | (16,600 | ) | | 15.16 |
| | | | 19 |
| Forfeited | (252,500 | ) | | 16.57 |
| | | | | Options outstanding at December 31, 2015 | 2,484,400 |
| | $ | 16.22 |
| | 8.0 | | $ | 1,225 |
| Granted | 708,000 |
| | 14.15 |
| | | | | Exercised | (196,000 | ) | | 16.18 |
| | | | 790 |
| Forfeited | (169,900 | ) | | 16.38 |
| | | | | Options outstanding at December 31, 2016 | 2,826,500 |
| | $ | 15.69 |
| | 7.6 | | $ | 14,956 |
| Options exercisable at December 31, 2016 | 1,245,375 |
| | $ | 15.94 |
| | 6.7 | | $ | 6,276 |
|
| | (1) | Intrinsic value for activities other than exercises is defined as the difference between the grant price and the market value on the last trading day of the period for those stock options where the market value is greater than the exercise price. For exercises, intrinsic value is defined as the difference between the grant price and the market value on the date of exercise. |
|
Summary of Black-Scholes Option Pricing Model Inputs Used for Valuation of Stock Options Outstanding | The following table summarizes the Black-Scholes Option Pricing Model inputs used for valuation of the stock options for Class A common shares issued during the years ended December 31, 2016, 2015 and 2014: | | | | | | | | | | | | | | 2016 | | 2015 | | 2014 | Weighted-average fair value | $ | 2.82 |
| | $ | 4.57 |
| | $ | 5.06 |
| Expected term (years) | 7.0 |
| | 7.0 |
| | 7.0 |
| Dividend yield | 3.0 | % | | 3.0 | % | | 3.0 | % | Volatility | 27.3 | % | | 35.9 | % | | 38.5 | % | Risk-free interest rate | 1.5 | % | | 1.9 | % | | 2.2 | % |
|
Summary of Restricted Stock Units Activity Under Plan | The following table summarizes the activity that relates to the Company's restricted stock units under the Plan for the years ended December 31, 2016, 2015 and 2014: | | | | | | | | | | | 2016 | | 2015 | | 2014 | Restricted stock units at beginning of period | 91,650 |
| | 85,000 |
| | — |
| Units awarded | 74,100 |
| | 44,000 |
| | 92,000 |
| Units vested | (27,250 | ) | | (22,000 | ) | | — |
| Units forfeited | (8,350 | ) | | (15,350 | ) | | (7,000 | ) | Restricted stock units at end of the period | 130,150 |
| | 91,650 |
| | 85,000 |
|
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