Other Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Component Of Operating Cost And Expense [Line Items]
Other expenses	$ 344	$ 1,753
Software Systems [Member]
Component Of Operating Cost And Expense [Line Items]
Other expenses	$ 344	1,003
Natural Disasters and Other Casualty Events [Member]
Component Of Operating Cost And Expense [Line Items]
Other expenses		$ 750