LONG-TERM DEBT - Additional Information (Detail) $ / shares in Units, shares in Millions				3 Months Ended		6 Months Ended
	Mar. 22, 2016 USD ($)	Oct. 31, 2014 USD ($)	Oct. 22, 2014 USD ($) purchaser day $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015	Feb. 05, 2015 USD ($)	Mar. 22, 2012 USD ($)
Debt Instrument [Line Items]
Principle amount of Notes						$ 9,475,000	$ 0
Payments on borrowings on credit facilities						0	$ 32,100,000
Utilized portion of credit facility , due with in one year						10,800,000		$ 9,773,000
Deferred financing fees						$ 3,874,000		$ 4,977,000
Second Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility											$ 325,000,000
Third Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility		$ 190,000,000
Allowable restructuring charges										$ 20,000,000
Financing fees classified as a debt extinguishment					$ 388,000
Amortization, deferred finance costs		$ 3,080,000
Leverage ratio, maximum							2.50		2.75
Fixed charge coverage, minimum		1.50
LIBOR Rate
Debt Instrument [Line Items]
Interest rate at the end of period						0.47%
Interest rate at the end of period, effective						3.22%
LIBOR Rate | Third Amended Restated Credit Agreement
Debt Instrument [Line Items]
Interest rate at the end of period		1.00%
LIBOR Rate | Third Amended Restated Credit Agreement | Minimum
Debt Instrument [Line Items]
Interest rate at the end of period		2.50%
LIBOR Rate | Third Amended Restated Credit Agreement | Maximum
Debt Instrument [Line Items]
Interest rate at the end of period		3.25%
Prime Lending Rate
Debt Instrument [Line Items]
Interest rate at the end of period						3.50%
Prime Lending Rate | Third Amended Restated Credit Agreement | Minimum
Debt Instrument [Line Items]
Interest rate at the end of period		1.50%
Prime Lending Rate | Third Amended Restated Credit Agreement | Maximum
Debt Instrument [Line Items]
Interest rate at the end of period		2.25%
Federal Funds Rate
Debt Instrument [Line Items]
Interest rate at the end of period						0.30%
Federal Funds Rate | Third Amended Restated Credit Agreement
Debt Instrument [Line Items]
Interest rate at the end of period		0.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Utilized portion of credit facility						$ 0
Utilized portion of credit facility , due with in one year						11,819,000
Deferred financing fees						1,019,000
Credit facility, available to be utilized after restriction						99,910,000
Letter of Credit
Debt Instrument [Line Items]
Utilized portion of credit facility						90,000
Senior Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Payments on borrowings on credit facilities		$ 98,900,000
Senior Unsecured Revolving Credit Facility | Second Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility											225,000,000
Senior Unsecured Revolving Credit Facility | Third Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility		$ 100,000,000
Senior Unsecured Revolving Credit Facility | Third Amended Restated Credit Agreement | Minimum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage		0.35%
Senior Unsecured Revolving Credit Facility | Third Amended Restated Credit Agreement | Maximum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage		0.50%
Senior Unsecured Revolving Credit Facility | Letter of Credit | Third Amended Restated Credit Agreement | Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage		2.50%
Senior Unsecured Revolving Credit Facility | Letter of Credit | Third Amended Restated Credit Agreement | Maximum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage		3.25%
Term Loan Facility | Second Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility											$ 100,000,000
Term Loan Facility | Third Amended Restated Credit Agreement
Debt Instrument [Line Items]
Maximum borrowings under senior unsecured revolving credit facility		$ 90,000,000
Term Loan Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt						66,292,000
Term Loan Facility | First Quarter
Debt Instrument [Line Items]
Amortization payments on outstanding principal amount of term loans, in 2017						3,083,000
Term Loan Facility | Second Quarter
Debt Instrument [Line Items]
Amortization payments on outstanding principal amount of term loans, in 2016						2,569,000
Amortization payments on outstanding principal amount of term loans, in 2017						3,083,000
Term Loan Facility | Third Quarter
Debt Instrument [Line Items]
Amortization payments on outstanding principal amount of term loans, in 2016						2,569,000
Amortization payments on outstanding principal amount of term loans, in 2017						3,083,000
Term Loan Facility | Fourth Quarter
Debt Instrument [Line Items]
Amortization payments on outstanding principal amount of term loans, in 2016						$ 3,083,000
3.50% Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Interest rate						3.50%		3.50%
3.50% Convertible Senior Notes Due 2019 | Convertible Debt
Debt Instrument [Line Items]
Aggregate principal amount			$ 143,750,000
Interest rate			3.50%			3.50%	3.50%
Option granted to initial purchasers and exercised, aggregate principal amount			$ 18,750,000
Net proceeds from sale of notes			139,031,000
Debt Issuance Costs, Gross			$ 4,719,000
Number of initial purchasers in capped call transactions | purchaser			1
Payments for capped call transactions			$ 16,531,000
Repayments of term loan outstanding			82,500,000
Repayments of borrowings under revolving credit facility			$ 40,000,000
Conversion rate per one thousand dollar principal amount of the Notes			0.1877405
Conversion price per share (in dollars per share) | $ / shares			$ 5.33
Convertible, threshold percentage of outstanding shares of common stock that require stockholder approval			19.99%
Convertible notes, shares convertible | shares			25
Debt convertible, threshold trading days | day			20
Debt convertible, threshold consecutive trading days			30 days
Debt convertible, threshold percentage of stock price trigger			130.00%
Measurement period			5 days
Debt convertible, maximum percentage of trading price			98.00%
Redemption price, percentage			100.00%
Debt instrument fair value			$ 122,829,000
Carrying value of permanent equity component reported in additional paid-in-capital			20,228,000
Stock repurchase program, authorized amount for debt repurchase	$ 10,000,000
Principle amount of Notes	$ 9,475,000
Loss on extinguishment of debt				$ 37,000
Long-term debt						$ 133,750,000		$ 143,750,000
3.50% Convertible Senior Notes Due 2019 | Equity Component | Convertible Debt
Debt Instrument [Line Items]
Debt Issuance Costs, Gross			$ 693,000
3.50% Convertible Senior Notes Due 2019 | Call Option | Convertible Debt
Debt Instrument [Line Items]
Initial cap price under capped call transaction (in dollars per share) | $ / shares			$ 7.035
Proceeds from partial termination of capped call				$ 409,000