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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