Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail)

v3.3.1.900
Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at December 31, 2014 $ (6,424)    
Other comprehensive income (loss) before reclassifications (4,222)    
Amounts reclassified out of accumulated other comprehensive income (loss) 5,014    
Other comprehensive income (loss) 792 $ 2,158 $ 11,381
Balance at December 31, 2015 (5,632) (6,424)  
Gains and Losses on Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at December 31, 2014 (5,973)    
Other comprehensive income (loss) before reclassifications (4,679)    
Amounts reclassified out of accumulated other comprehensive income (loss) 5,014    
Other comprehensive income (loss) 335    
Balance at December 31, 2015 (5,638) (5,973)  
Defined Benefit Pension Plan [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at December 31, 2014 (451)    
Other comprehensive income (loss) before reclassifications 457    
Other comprehensive income (loss) 457    
Balance at December 31, 2015 $ 6 $ (451)