Quarterly report pursuant to Section 13 or 15(d)

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
business_line
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of business lines | business_line 4    
Retained earnings $ 34,042   $ 5,555
Accounting Standards Update 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings   $ 8,105  
Adjustments due to ASU 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings $ 4,164    
Adjustments due to ASU 2014-09 | Accounting Standards Update 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect on retained earnings   2,600  
Retained earnings   $ 2,550