|
Reconciliation of Valuation Allowance (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Jun. 30, 2012
|
Dec. 31, 2013
|
Dec. 31, 2011
|
Dec. 31, 2013
Addition to Valuation Allowance
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Dec. 31, 2012
Valuation Allowance Release
|
|
| Valuation Allowance [Line Items] | ||||||
| Balance at beginning of the year | $ 6,076 | $ 40,188 | ||||
| Valuation allowance additions (release) | (17,800) | (20,700) | 4,419 | (38,531) | ||
| Balance at end of the year | $ 1,657 | $ 6,076 | $ 40,188 | |||