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Equity and Noncontrolling Interests - Additional Information (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 02, 2017 | Aug. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2012
Class Of Stock [Line Items] |  |  |  |  |  |
Stock issued during period shares |  | 2,530,000 |  |  |  |
Shares issued price per share |  | $ 27.50 |  |  |  |
Gross proceeds from issuance of common stock |  | $ 69,575,000 |  |  |  |
Net proceeds after underwriting discounts and offering expenses |  | $ 65,509,000 | $ 65,509,000 |  |  |
Exercise price of warrants, per share |  |  |  |  |  | $ 11.58
Warrant expiration date |  |  |  |  |  | Dec. 12, 2022
Stock issued during period shares warrants excercised | 153,134 |  |  |  |  |
Maximum time to receive shares at special events |  |  | 30 days |  |  |
Series A Preferred Dividends |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Dividend rate |  |  | Prime + 2% | Prime + 2% |  |
Dividend rate |  |  | 8.00% | 8.00% |  |
Company's redemption rights modified date |  |  | Oct. 15, 2018 |  |  |
Conversion ratio - preferred to common |  |  | 6.94008 |  |  |
Number of preferred stock converted |  |  | 0 | 0 | 0 |
Series B Preferred Dividends |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Dividend rate |  |  | 8.00% | 8.00% |  |
Company's redemption rights modified date |  |  |  | Oct. 15, 2018 |  |
Conversion ratio - preferred to common |  |  | 6.94008 |  |  |
Number of preferred stock converted |  |  | 880 | 0 | 0 |
880 Shares of Preferred Stock Series B |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Liquidation preference value |  |  | $ 88,000 |  |  |
Common stock issued upon conversion |  |  | 6,106 |  |  |
Warrant |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Warrants issued to Triumph Consolidated Cos LLC |  |  |  |  |  | 259,067
Over-Allotment Option |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Stock issued during period shares |  | 330,000 |  |  |  |

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