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LONG TERM DEBT - Additional Information (Detail)
 3 Months Ended
Apr. 06, 2015
USD ($)
May. 21, 2014
USD ($)
$ / shares
shares
Dec. 07, 2012
USD ($)
Apr. 23, 2012
USD ($)
$ / note
Mar. 31, 2016
Dec. 06, 2012
USD ($)
$ / note
Senior Notes            
Debt Instrument [Line Items]            
Minimum redemption period notice required         30 days  
Maximum redemption period notice required         60 days  
Redemption price, percentage         100.00%  
Senior Notes | 7.50% Senior Notes Due April 15, 2020            
Debt Instrument [Line Items]            
Aggregate principal amount issued       $ 33,000,000.0   $ 45,000,000.0
Stated interest rate       7.50%    
Sale price of notes to public | $ / note       25.00   25.00
Net proceeds from issuance of long term debt     $ 50,100,000 $ 31,700,000    
Exercise of underwriters' overallotment option     $ 6,800,000      
Senior Notes | 5.25% Senior Notes Due April 15, 2025            
Debt Instrument [Line Items]            
Aggregate principal amount issued $ 175,000,000          
Stated interest rate 5.25%          
Net proceeds from issuance of long term debt $ 172,800,000          
Junior Subordinated Debt | 7.50% Amortizing Note Due May 15, 2017            
Debt Instrument [Line Items]            
Stated interest rate   7.50%        
Gross proceeds from issuance of tangible equity units   $ 69,000,000        
Tangible equity units dividend rate   8.00%        
Tangible equity units issued during period, shares | shares   1,380,000        
Tangible equity units issued to underwriter during period, shares | shares   180,000        
Tangible equity units, price per share | $ / shares   $ 50.00        
Tangible equity units, convertible, conversion ratio   10.604556        
Fair value of debt instrument   $ 14,600,000        
Adjustments to additional paid in capital, issuance of tangible equity units   54,400,000        
Tangible equity units issued, issuance costs   4,000,000        
Tangible equity units issued, issuance costs, underwriter discount   3,300,000        
Debt instrument, deferred finance cost   857,000        
Adjustments to additional paid in capital, tangible equity units issued, issuance costs   $ 3,200,000