v3.10.0.1
Credit Facility (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Aug. 01, 2018
Dec. 31, 2017
Credit Facility              
Repayment of line of credit       $ 656 $ 10,875    
Credit Facility              
Credit Facility              
Amortization and interest expense capitalized   $ 274 $ 159 575 585    
Amortization and interest expense expensed   8 $ 36 $ 58 $ 144    
Credit Facility | Minimum              
Credit Facility              
Interest rate percentage       4.20%      
Credit Facility | Maximum              
Credit Facility              
Interest rate percentage       4.80%      
Credit Facility | LIBOR | Minimum              
Credit Facility              
Spread on floating interest rate (as a percent)       2.50%      
Credit Facility | LIBOR | Maximum              
Credit Facility              
Spread on floating interest rate (as a percent)       3.50%      
Credit Facility | Prime Rate | Minimum              
Credit Facility              
Spread on floating interest rate (as a percent)       1.50%      
Credit Facility | Prime Rate | Maximum              
Credit Facility              
Spread on floating interest rate (as a percent)       2.50%      
Revolving Line of Credit              
Credit Facility              
Current issued borrowing capacity   69,750   $ 69,750      
Maximum borrowing capacity with an option to increase the available amount upon the satisfaction of certain conditions   86,500   86,500      
Outstanding balance   15,000   $ 15,000     $ 0
Repayment of line of credit $ 15,000            
Revolving Line of Credit | Minimum              
Credit Facility              
Fee on unused portion of Revolving Line of Credit (as a percent)       0.375%      
Revolving Line of Credit | Maximum              
Credit Facility              
Fee on unused portion of Revolving Line of Credit (as a percent)       0.50%      
Term Loan              
Credit Facility              
Current issued borrowing capacity   3,500   $ 3,500      
Outstanding balance   $ 219   $ 219     $ 875
Senior secured credit facilities              
Credit Facility              
Current issued borrowing capacity           $ 28,000