Income Taxes - Schedule of Jurisdictional Amount of NOLs and the Years in Which They Will Expire (Detail) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
USD ($)
| |
| U.S. State [Member] | |
| Tax Credit Carryforward [Line Items] | |
| NOL amount | $ 33.4 |
| Canada [Member] | Foreign [Member] | |
| Tax Credit Carryforward [Line Items] | |
| NOL amount | 107.6 |
| Canada [Member] | Provincial [Member] | |
| Tax Credit Carryforward [Line Items] | |
| NOL amount | $ 178.1 |
| Minimum [Member] | U.S. State [Member] | |
| Tax Credit Carryforward [Line Items] | |
| Jurisdictional tax NOLs year of expiration | 2029 |
| Minimum [Member] | Canada [Member] | Foreign [Member] | |
| Tax Credit Carryforward [Line Items] | |
| Jurisdictional tax NOLs year of expiration | 2031 |
| Minimum [Member] | Canada [Member] | Provincial [Member] | |
| Tax Credit Carryforward [Line Items] | |
| Jurisdictional tax NOLs year of expiration | 2031 |
| Maximum [Member] | U.S. State [Member] | |
| Tax Credit Carryforward [Line Items] | |
| Jurisdictional tax NOLs year of expiration | 2035 |