|
Carrying and Fair Value of Senior Notes (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Debt Instrument [Line Items] | ||
| Carrying value | $ 200,000 | $ 200,000 |
| Senior Notes 7.875 Percent Due 2020 | ||
| Debt Instrument [Line Items] | ||
| Carrying value | 200,000 | 200,000 |
| Fair value | $ 211,000 | $ 206,000 |