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REDEEMABLE NON-CONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Dec. 31, 2017
Changes in Carrying Amount of Redeemable Non-Controlling Interests [Roll Forward]
Beginning balance			$ 102,572
Ending balance	$ 128,906		128,906
Carrying Amount (Fair Value) of Redeemable Non-Controlling Interest [Abstract]
Fair value	128,906		128,906		$ 128,906	$ 102,572
Redeemable Non-Controlling Interest [Member]
Changes in Carrying Amount of Redeemable Non-Controlling Interests [Roll Forward]
Beginning balance	117,027	$ 11,940	102,572	$ 0
Operating results allocated to redeemable non-controlling interest partners	2,456	155	6,802	155
Distributions to redeemable non-controlling interest partners	(2,497)	(16)	(6,576)	(16)
Changes in the fair value of redeemable non-controlling interest	8,681	0	18,106	0
Purchase of new business	3,282	0	8,145	11,940
Other	(43)	0	(143)	0
Ending balance	128,906	12,079	128,906	12,079
Carrying Amount (Fair Value) of Redeemable Non-Controlling Interest [Abstract]
Contractual time period has lapsed but holder's employment has not been terminated					34,587	32,416
Contractual time period has not lapsed and holder's employment has not been terminated					94,319	70,156
Fair value	$ 117,027	$ 11,940	$ 102,572	$ 0	$ 128,906	$ 102,572

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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Amount after tax of income (loss) attributable to other redeemable noncontrolling equity holder.

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Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

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Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

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The distributions during the period for redemption of mandatorily redeemable noncontrolling interests.

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