Portfolio Loans Covered by Loss Share (Covered loans) - Summary of Aging of the Recorded Investment in Past Due Covered Loans by Portfolio Class and Category (Details) (Covered Loans, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	$ 1,323	$ 6,466
90 or More Days Past Due	12,561	19,809
Total Past Due	13,884	26,275
Current	104,620	114,263
Total	118,504	140,538
Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	395	397
90 or More Days Past Due	563	573
Total Past Due	958	970
Current	6,342	8,301
Total	7,300	9,271
Consumer & Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	17	0
90 or More Days Past Due	0	0
Total Past Due	17	0
Current	471	1,773
Total	488	1,773
Commercial Real Estate Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	65	255
90 or More Days Past Due	3,612	6,595
Total Past Due	3,677	6,850
Current	26,719	25,675
Total	30,396	32,525
Commercial Real Estate Investor Owned
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	109	5,143
90 or More Days Past Due	5,935	3,167
Total Past Due	6,044	8,310
Current	35,655	39,836
Total	41,699	48,146
Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	0	32
90 or More Days Past Due	80	4,198
Total Past Due	80	4,230
Current	7,805	10,095
Total	7,885	14,325
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	737	639
90 or More Days Past Due	2,371	5,276
Total Past Due	3,108	5,915
Current	27,628	28,583
Total	$ 30,736	$ 34,498