Consolidated Financial Statements - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	less than 1.0%
Water St. [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	less than 1.0%