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LONG-TERM DEBT - Additional Information (Detail) - USD ($)		6 Months Ended
	Apr. 06, 2015	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par Value		$ 175,000,000	$ 175,000,000
Senior Notes
Debt Instrument [Line Items]
Redemption period		90 days
Minimum redemption period notice required		30 days
Maximum redemption period notice required		60 days
Redemption price, percentage		100.00%
Senior Notes | 5.25% Senior Notes Due April 15, 2025
Debt Instrument [Line Items]
Par Value	$ 175,000,000.0	$ 175,000,000	$ 175,000,000
Stated interest rate	5.25%	5.25%
Net proceeds from issuance of long term debt	$ 172,800,000

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Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Contractual interest rate for funds borrowed, under the debt agreement.

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