Portfolio Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured (Details) (Non-Covered Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 loan	Mar. 31, 2014 loan
Financing Receivable, Modifications [Line Items]
Number of Loans	0	2
Pre-Modification Outstanding Recorded Balance	$ 0	$ 1,292
Post-Modification Outstanding Recorded Balance	0	1,042
Commercial & Industrial
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Balance	0	0
Post-Modification Outstanding Recorded Balance	0	0
Commercial Real Estate Owner Occupied
Financing Receivable, Modifications [Line Items]
Number of Loans	0	2
Pre-Modification Outstanding Recorded Balance	0	1,292
Post-Modification Outstanding Recorded Balance	0	1,042
Commercial Real Estate Investor Owned
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Balance	0	0
Post-Modification Outstanding Recorded Balance	0	0
Construction and Land Development
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Balance	0	0
Post-Modification Outstanding Recorded Balance	0	0
Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Balance	0	0
Post-Modification Outstanding Recorded Balance	0	0
Consumer & Other
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Balance	0	0
Post-Modification Outstanding Recorded Balance	$ 0	$ 0