IMPAIRMENT LOSSES AND RESTRUCTURING CHARGES Summary of Activity, Restructuring Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Balance	$ 914	$ 105	$ 16
Expense (reversal)	(104)	1,737	2,406
Payments, net of receipts for sublease	(810)	(928)	(2,317)
Balance	0	914	105
Domestic [Member]
Restructuring Reserve [Roll Forward]
Balance	802	96	16
Expense (reversal)	(129)	1,561	1,064
Payments, net of receipts for sublease	(673)	(855)	(984)
Balance	0	802	96
Nearshore [Member]
Restructuring Reserve [Roll Forward]
Balance	112	9	0
Expense (reversal)	25	112	1,342
Payments, net of receipts for sublease	(137)	(9)	(1,333)
Balance	0	112	9
Offshore [Member]
Restructuring Reserve [Roll Forward]
Balance	0	0	0
Expense (reversal)	0	64	0
Payments, net of receipts for sublease	0	(64)	0
Balance	$ 0	$ 0	$ 0