Annual report pursuant to Section 13 and 15(d)

Reconciliation of Beginning and Ending Balance for Liabilities Measured at Fair Value on Recurring Basis Unobservable Inputs (Detail)

v3.6.0.2
Reconciliation of Beginning and Ending Balance for Liabilities Measured at Fair Value on Recurring Basis Unobservable Inputs (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balances - Liabilities $ 373 $ 4,572
Total (gain) loss included in accumulated other comprehensive loss 71 (155)
Settlements $ (444) (4,790)
Ending balances - Liabilities   $ 373