Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance at December 31, 2014     $ (6,424)  
Other comprehensive income (loss) before reclassifications     (2,922)  
Amounts reclassified out of accumulated other comprehensive income (loss)     2,891  
Other comprehensive income (loss) $ 892 $ (302) (31) $ 735
Balance at June 30, 2015 (6,455)   (6,455)  
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     (2,922)  
Amounts reclassified out of accumulated other comprehensive income (loss)     2,891  
Other comprehensive income (loss)     (31)  
Balance at June 30, 2015 (6,004)   (6,004)  
Defined Benefit Pension Plan [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance at December 31, 2014     (451)  
Balance at June 30, 2015 $ (451)   $ (451)