RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction Line Items
Revenues	$ 394,356,000	$ 375,249,000
Airmax [Member]
Related Party Transaction Line Items
Purchases from Related Party	300,000	300,000
Accounts Payable Due from Related Party	170,000
Convercent [Member]
Related Party Transaction Line Items
Purchases from Related Party	15,000	15,000
CafeX [Member]
Related Party Transaction Line Items
Purchases from Related Party	$ 16,000	15,000
Motif [Member]
Related Party Transaction Line Items
Lease Expiration Date	Mar. 31, 2019
Welltok
Related Party Transaction Line Items
Revenues	$ 1,400,000	$ 800,000

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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