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REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]      
Deferred contract liability   $ 9,400  
Revenue previously deferred   9,700  
Accrued liability     $ 4,000
Deferred contract liability $ 6,700 6,700 $ 6,900
Increase in deferred contract liability   2,900  
Increase in deferred tax asset   700  
Decrease in retained earnings   (2,200)  
Net increase in firearms sales $ 2,600 $ 300