Discontinued Operations - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended			1 Months Ended					3 Months Ended		6 Months Ended
	Jun. 30, 2013 Property	Dec. 31, 2013	Dec. 31, 2012 Property	Jun. 30, 2013 Minimum	Jul. 25, 2013 Subsequent Event	Jul. 26, 2013 Subsequent Event	Jun. 30, 2013 Outstanding Claims for More than Sixty Months	Jun. 30, 2013 Outstanding Claims for More Than Thirty Six but Less Than Sixty Months	Jun. 30, 2013 Outstanding Claims for More Than Twenty Four but Less Than Thirty Six Months	Mar. 31, 2013 Discontinued Operations	Mar. 31, 2012 Discontinued Operations	Jun. 30, 2013 Discontinued Operations	Jun. 30, 2012 Discontinued Operations	Dec. 31, 2012 Discontinued Operations	Jun. 30, 2013 Discontinued Operations Loans and investments	Dec. 31, 2012 Discontinued Operations Loans and investments	Jun. 30, 2013 Discontinued Operations Prepaid Expense	Dec. 31, 2012 Discontinued Operations Prepaid Expense
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from redemption of FHLB stock					$ 2,100,000	$ 2,100,000
Federal home loan bank stock redemption period	5 years	5 years
Number of real estate owned properties	1		7
Other asset															51,000	51,000	48,000	38,000
Loans originated from 2002 through Q1-2007, subject to representations and warranties				120,000,000,000
Mortgage loan repurchase claims outstanding	101,700,000						61,600,000	11,400,000	28,700,000
Mortgage loan repurchase claims outstanding, percentage							60.60%	11.20%	28.20%
Repurchase reserve												7,000,000		7,500,000
Recoveries of provisions for repurchases										$ 200,000	$ 200,000	$ 500,000	$ 500,000