LONG-TERM DEBT - Additional Information (Detail) $ / shares in Units, shares in Millions			3 Months Ended	9 Months Ended
	Oct. 31, 2014 USD ($)	Oct. 22, 2014 USD ($) day $ / shares shares	Dec. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2015	Mar. 31, 2015	Feb. 05, 2015 USD ($)	Mar. 22, 2012 USD ($)
Debt Instrument [Line Items]
Payments on borrowings on credit facilities				$ 32,100,000	$ 8,100,000
Utilized portion of credit facility			$ 87,750,000	74,000,000
Utilized portion of credit facility , due with in one year			9,563,000	10,278,000
Credit facility, available to be utilized after restriction				$ 56,908,000
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				0.19%
Interest rate at the end of period, effective				3.45%
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				3.25%
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				0.07%
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
Letter of Credit
Debt Instrument [Line Items]
Utilized portion of credit facility				89,000
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 | First 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 | 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 2015				2,569,000
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]
Aggregate principal amount		$ 143,750,000
Option granted to initial purchasers and exercised, aggregate principal amount		$ 18,750,000
Interest rate		3.50%	3.50%	3.50%
Net proceeds from sale of notes		$ 139,031,000
Fees and expenses		4,719,000
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		27
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%
Debt convertible, maximum percentage of trading price		98.00%
Redemption price, percentage		100.00%
Measurement period		5 days
Debt instrument fair value		$ 122,829,000
Carrying value of permanent equity component reported in additional paid-in-capital		20,228,000
3.50% Convertible Senior Notes Due 2019 | Equity Component
Debt Instrument [Line Items]
Fees and expenses		$ 693,000
3.50% Convertible Senior Notes Due 2019 | Call Option
Debt Instrument [Line Items]
Initial cap price under capped call transaction | $ / shares		$ 7.035