Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2014
|
Dec. 31, 2013
|
---|---|---|
Income Tax [Line Items] | ||
Unrecognized tax benefits expected to reverse | $ 0 | |
Domestic [Member]
|
||
Income Tax [Line Items] | ||
Gross cumulative unrecognized tax benefits | 2.1 | 2.1 |
Canada [Member]
|
||
Income Tax [Line Items] | ||
Gross cumulative unrecognized tax benefits | $ 6.9 | $ 7.9 |