Portfolio Loans Not Covered by Loss Share ("Non-covered") - Summary of Recorded Investment in Impaired Non-covered Loans by Category (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 loan	Jun. 30, 2013 loan	Jun. 30, 2014 loan	Jun. 30, 2013 loan	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Modifications Reserve	$ 298		$ 298
Table Text Block Supplement [Abstract]
Number of non-covered loans restructured and defaulted			no	0
Non-Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	728	0	1,770	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	728	0	2,020	5
Financing Receivable, Modifications, Number of Contracts	2	0	4	1
Non-accrual	18,705		18,705		20,888
Restructured	1,502		1,502		678
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	20,207		20,207		21,566
Non-Covered Loans | Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0	0	0	5
Financing Receivable, Modifications, Number of Contracts	0	0	0	1
Non-accrual	4,103		4,103		3,384
Restructured	0		0		0
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	4,103		4,103		3,384
Non-Covered Loans | Commercial Real Estate Investor Owned
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	603	0	603	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	603	0	603	0
Financing Receivable, Modifications, Number of Contracts	1	0	1	0
Non-accrual	4,693		4,693		6,511
Restructured	597		597		678
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	5,290		5,290		7,189
Non-Covered Loans | Commercial Real Estate Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	1,042	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment		0		0
Financing Receivable, Modifications, Number of Contracts	0	0	2	0
Non-accrual	1,559		1,559		622
Restructured	780		780		0
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	2,339		2,339		622
Non-Covered Loans | Real Estate Loans Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		1,292
Non-Covered Loans | Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0	0	0	0
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Non-accrual	7,919		7,919		9,802
Restructured	0		0		0
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	7,919		7,919		9,802
Non-Covered Loans | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	125	0	125	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	125	0	125	0
Financing Receivable, Modifications, Number of Contracts	1	0	1	0
Non-accrual	431		431		569
Restructured	125		125		0
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	556		556		569
Non-Covered Loans | Consumer & Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0	0	0	0
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Non-accrual	0		0		0
Restructured	0		0		0
Loans over 90 days past due and still accruing interest	0		0		0
Total Recorded Investment	$ 0		$ 0		$ 0