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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2013
USD ($)
Oct. 31, 2015
USD ($)
Jul. 31, 2014
Dec. 31, 2013
USD ($)
Sep. 30, 2015
USD ($)
$ / shares
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
item
$ / shares
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Change in Accounting Estimate                  
Net book value         $ 195,559   $ 195,559   $ 180,271
Net income         6,394 $ 4,074 $ 15,536 $ 10,374  
SEGMENT INFORMATION                  
Number of operating segments | item             2    
Number of reportable segments | item             1    
Monarch Black Hawk Parking Structure                  
Change in Accounting Estimate                  
Net book value $ 4,800     $ 4,800          
Estimated depreciable life P37Y                
Monarch Black Hawk Parking Structure | Service Life                  
Change in Accounting Estimate                  
Net book value         400   $ 400    
Estimated depreciable life     P18M P15M          
Depreciation expense per month       $ 300          
Depreciation expense net of tax per month       $ 200          
Depreciation expense         400   1,400    
Net income         $ (300)   $ (900)    
Basic and diluted earnings per share (in dollars per share) | $ / shares         $ (0.02)   $ (0.06)    
Monarch Black Hawk Parking Structure | Subsequent Event [Member] | Service Life                  
Change in Accounting Estimate                  
Depreciation expense per month   $ 40