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INCOME TAXES - Changes in Liability for Tax Uncertainties, Excluding Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in liability for tax uncertainties, excluding interest
Balance at beginning of year	$ 45,126	$ 40,317	$ 40,937
Additions for tax positions related to the current year	14,916	11,545	8,396
Additions for tax positions of prior years	2,653	5,318	2,308
Reductions for tax positions of prior years	(1,616)	(4,109)	(7,242)
Reductions due to statute lapse	(402)	(1,271)	(18)
Settlements, audit payments, refunds - net	(101)	(6,674)	(4,064)
Balance at end of year	60,576	45,126	$ 40,317
Liability for tax uncertainties	$ 17,000	$ 9,000

X

- Definition

Other information relative to a tax position which it is highly certain that the total amount of the unrecognized tax benefit will significantly increase or decrease but the timing of deductibility is uncertain.

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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