FINANCING RECEIVABLES - Summary of Financing Receivables (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer balances with past due amounts reclassified to trade accounts receivable	$ 10,970	$ 6,990
Total customer balances with no past due amounts reclassified to trade accounts receivable	4,247	1,194
Total financing receivables with contractual maturities of one year or less	1,704	5,068
Less: allowance for losses	(1,929)	(2,198)	$ (654)
Total financing receivables	14,992	11,054
1 to 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer balances with past due amounts reclassified to trade accounts receivable	8,632	6,167
91 to 180 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer balances with past due amounts reclassified to trade accounts receivable	1,511	550
181 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer balances with past due amounts reclassified to trade accounts receivable	$ 827	$ 273