Non-Covered Loans and Allowance for Non-Covered Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
A/B Note | Minimum | Bank
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Number of loans into which a single loan is reconfigured		2
Non-covered loans
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications	$ 333	$ 11,445
Non-covered loans | Payment Term Extension
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications	333	11,445
Non-covered loans | Secured
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications	333	9,764
Non-covered loans | Secured | Payment Term Extension
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications	333	9,764
Non-covered loans | Secured by commercial properties
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		276
Non-covered loans | Secured by commercial properties | Payment Term Extension
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		276
Non-covered loans | Secured by residential properties
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		905
Non-covered loans | Secured by residential properties | Payment Term Extension
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		905
Non-covered loans | Commercial construction loans and land development
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		500
Non-covered loans | Commercial construction loans and land development | Payment Term Extension
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Total Modifications		$ 500