Securities and Loan Securities Carried at Fair Value - Securities and Loan Securities Carried at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jul. 31, 2014	Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items]
Assets measured at fair value on a recurring basis / Liquidation Value		$ 226	$ 226
Cost	161		161
Fair Value			226
Loan Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Cost	161		161
Fair Value			226
Liquidation Value [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Assets measured at fair value on a recurring basis / Liquidation Value	918
Liquidation Value [Member] | Loan Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Assets measured at fair value on a recurring basis / Liquidation Value	$ 918