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)

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Reconciliation of Beginning and Ending Balance for Liabilities Measured at Fair Value on Recurring Basis Unobservable Inputs (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balances - Liabilities $ 14,192 $ 16,576
Total loss included in accumulated other comprehensive loss 803 11,403
Total gain included in earnings, Liabilities   (808)
Settlements (5,819) (12,979)
Ending balances - Liabilities $ 9,176 $ 14,192