Statement of Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended			12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2013 Future death benefit [Member]	Dec. 31, 2012 Future death benefit [Member]	Dec. 31, 2013 Software license [Member]
Summary Of Significant Accounting Policies [Line Items]
Business segments	1
Equity investments	20.00%
Loans past due days	90 days
Excess impaired credits	$ 100,000
Other liabilities		$ 3,600,000	$ 3,800,000
Software purchases and developed are capitalized and amortized on straight-line basis	7 years			10 years