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REVENUE FROM CONTACTS WITH CUSTOMERS - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 151,044	$ 449,464
10-year agreement
Revenue from External Customer [Line Items]
Contract liability	2,200	2,200	$ 2,400
Decrease in Contract with Customer, Liability	100	200
Contract with Customer, Liability, Revenue Recognized	$ 100	200
Insurance commissions [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 2,400

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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