Covered Loans Receivable (Credit Quality Indicators) (Details) (Covered Loans, USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Pass	$ 77,690	$ 44,687
OAEM	5,553	7,248
Substandard	40,370	7,573
Doubtful	2,587	4,246
Total	126,200	63,754
One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Pass	5,414	3,739
OAEM	425	882
Substandard	151	156
Doubtful		0
Total	5,990	4,777
Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Pass	61,310	37,134
OAEM	5,128	6,260
Substandard	36,208	6,041
Doubtful	2,587	4,246
Total	105,233	53,681
Commercial Business | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Pass	11,297	9,516
OAEM	131	3,887
Substandard	5,442	702
Doubtful	2,240	585
Total	19,110	14,690
Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Pass	40,357	21,084
OAEM	4,957	2,318
Substandard	13,583	708
Doubtful	347	256
Total	59,244	24,366
Commercial Business | Non-owner Occupied Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Pass	9,656	6,534
OAEM	40	55
Substandard	17,183	4,631
Doubtful	0	3,405
Total	26,879	14,625
Real Estate Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Pass	3,936	698
OAEM	0	0
Substandard	2,070	858
Doubtful	0	0
Total	6,006	1,556
Real Estate Construction and Land Development | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Pass	2,178	698
OAEM	0	0
Substandard	268	858
Doubtful	0	0
Total	2,446	1,556
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Financing Receivable, Recorded Investment [Line Items]
Pass	1,758	0
OAEM	0	0
Substandard	1,802	0
Doubtful	0	0
Total	3,560	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Pass	7,030	3,116
OAEM	0	106
Substandard	1,941	518
Doubtful	0	0
Total	$ 8,971	$ 3,740