ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS (Tables)

12 Months Ended

Dec. 31, 2018

ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS [Abstract]

Schedule of Accounts Receivable

Accounts receivable, net in the accompanying Consolidated Balance Sheets consists of the following (in thousands):

	December 31,
	2018		2017
Accounts receivable	$	355,107	$	392,823
Less: Allowance for doubtful accounts		(4,145)		(921)
Accounts receivable, net	$	350,962	$	391,902

Schedule of Change in Allowance for Doubtful Accounts

Activity in the Company’s Allowance for doubtful accounts consists of the following (in thousands):

	December 31,
	2018		2017		2016
Balance, beginning of year	$	921	$	662	$	2,176
Provision for doubtful accounts		3,679		458		1,164
Uncollectible receivables written-off		(429)		(180)		(2,670)
Effect of foreign currency and other		(26)		(19)		(8)
Balance, end of year	$	4,145	$	921	$	662

Schedule of Revenue from Significant Clients

	Year Ended December 31,
	2018		2017		2016
Healthcare client	10	%	7	%	4	%
Telecommunications client	7	%	9	%	10	%

Schedule of Accounts Receivable Outstanding from Significant Clients

Accounts receivable from these clients was as follows (in thousands):

	Year Ended December 31,
	2018		2017		2016
Healthcare client	$	49,245	$	56,802	$	22,414
Telecommunications client	$	19,329	$	27,111	$	28,080