Capital Stock - Schedule of Unamortized Value of Restricted Stock (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amortization Expense [Line Items]
Total Unamortized value	$ 706	$ 407	$ 0
1st quarter 2014 [Member]
Amortization Expense [Line Items]
Total Unamortized value	100
2nd quarter 2014 [Member]
Amortization Expense [Line Items]
Total Unamortized value	100
3rd quarter 2014 [Member]
Amortization Expense [Line Items]
Total Unamortized value	100
4th quarter 2014 [Member]
Amortization Expense [Line Items]
Total Unamortized value	100
1st quarter 2015 [Member]
Amortization Expense [Line Items]
Total Unamortized value	96
2nd quarter 2015 [Member]
Amortization Expense [Line Items]
Total Unamortized value	54
3rd quarter 2015 [Member]
Amortization Expense [Line Items]
Total Unamortized value	54
4th quarter 2015 [Member]
Amortization Expense [Line Items]
Total Unamortized value	54
1st quarter 2016 [Member]
Amortization Expense [Line Items]
Total Unamortized value	$ 48