Annual report pursuant to Section 13 and 15(d)

Guaranteed Preferred Beneficial Interest in the Company's Junior Subordinated Debentures - Summary of Financial Information of Trust (Detail)

v3.3.1.900
Guaranteed Preferred Beneficial Interest in the Company's Junior Subordinated Debentures - Summary of Financial Information of Trust (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Schedule of Investments [Line Items]    
Total assets $ 1,864,447 $ 1,903,013
Stockholder's equity - trust common securities 468,544 513,143
Total liabilities and stockholders' equity 1,864,447 $ 1,903,013
Preferred Junior Subordinated Debentures    
Schedule of Investments [Line Items]    
Non-current assets - junior subordinated debentures 126,446  
Common Junior Subordinated Debentures    
Schedule of Investments [Line Items]    
Non-current assets - junior subordinated debentures 3,261  
Trust Preferred Securities    
Schedule of Investments [Line Items]    
Non-current liabilities - trust preferred securities 126,446  
Common Trust Securities    
Schedule of Investments [Line Items]    
Stockholder's equity - trust common securities 3,261  
Trust Securities    
Schedule of Investments [Line Items]    
Total liabilities and stockholders' equity 129,707  
Junior Subordinated Debentures    
Schedule of Investments [Line Items]    
Total assets $ 129,707