Acquired Loans Part 6 (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	$ 39,678		$ 10,608
Past Due Greater Than 90 Days	75,719	[1]	10,074	[1]
Total Past Due	115,397		20,682
Nonaccrual	2,911	[2]	1,103	[2]
Current Loans	932,408		111,779
Acquired loans	1,050,716		133,564
Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	7,753		6,213
Past Due Greater Than 90 Days	2,250	[1]	3,724	[1]
Total Past Due	10,003		9,937
Nonaccrual	675	[2]	727	[2]
Current Loans	36,911		41,377
Acquired loans	47,589		52,041
Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	31,925		4,395
Past Due Greater Than 90 Days	73,469	[1]	6,350	[1]
Total Past Due	105,394		10,745
Nonaccrual	2,236	[2]	376	[2]
Current Loans	895,497		70,402
Acquired loans	1,003,127		81,523
Real Estate Secured Financing Receivable [Member] | Construction Land Development And Other Financing Receivable [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	1,315		240
Past Due Greater Than 90 Days	250	[1]	246	[1]
Total Past Due	1,565		486
Nonaccrual	445	[2]	445	[2]
Current Loans	1,865		2,993
Acquired loans	3,875		3,924
Real Estate Secured Financing Receivable [Member] | Construction Land Development And Other Financing Receivable [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	5,376		0
Past Due Greater Than 90 Days	44,209	[1]	3,622	[1]
Total Past Due	49,585		3,622
Nonaccrual	475	[2]	0	[2]
Current Loans	88,382		6,434
Acquired loans	138,442		10,056
Real Estate Secured Financing Receivable [Member] | Secured by 1-4 Family Residential Properties [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	2,043		1,705
Past Due Greater Than 90 Days	1,344	[1]	1,883	[1]
Total Past Due	3,387		3,588
Nonaccrual	176	[2]	234	[2]
Current Loans	17,417		20,168
Acquired loans	20,980		23,990
Real Estate Secured Financing Receivable [Member] | Secured by 1-4 Family Residential Properties [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	8,063		458
Past Due Greater Than 90 Days	12,396	[1]	1,392	[1]
Total Past Due	20,459		1,850
Nonaccrual	537	[2]	243	[2]
Current Loans	188,662		17,311
Acquired loans	209,658		19,404
Real Estate Secured Financing Receivable [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	3,817		3,953
Past Due Greater Than 90 Days	592	[1]	1,539	[1]
Total Past Due	4,409		5,492
Nonaccrual	0	[2]	0	[2]
Current Loans	12,946		12,915
Acquired loans	17,355		18,407
Real Estate Secured Financing Receivable [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	13,737		3,526
Past Due Greater Than 90 Days	12,733	[1]	1,217	[1]
Total Past Due	26,470		4,743
Nonaccrual	435	[2]	133	[2]
Current Loans	313,048		40,773
Acquired loans	339,953		45,649
Real Estate Secured Financing Receivable [Member] | Other Real Estate Secured Financing Receivable [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	121		221
Past Due Greater Than 90 Days	0	[1]	52	[1]
Total Past Due	121		273
Nonaccrual	6	[2]	9	[2]
Current Loans	3,238		3,285
Acquired loans	3,365		3,567
Real Estate Secured Financing Receivable [Member] | Other Real Estate Secured Financing Receivable [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	1,358		30
Past Due Greater Than 90 Days	965	[1]	44	[1]
Total Past Due	2,323		74
Nonaccrual	26	[2]	0	[2]
Current Loans	29,859		595
Acquired loans	32,208		669
Commercial And Industrial Loans Financing Receivable [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	90		94
Past Due Greater Than 90 Days	64	[1]	4	[1]
Total Past Due	154		98
Nonaccrual	48	[2]	39	[2]
Current Loans	446		610
Acquired loans	648		747
Commercial And Industrial Loans Financing Receivable [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	2,156		217
Past Due Greater Than 90 Days	2,722	[1]	23	[1]
Total Past Due	4,878		240
Nonaccrual	763	[2]	0	[2]
Current Loans	229,645		2,795
Acquired loans	235,286		3,035
Consumer Loans Financing Receivable [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	0		0
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	0		0
Nonaccrual	0	[2]	0	[2]
Current Loans	179		177
Acquired loans	179		177
Consumer Loans Financing Receivable [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	1,042		164
Past Due Greater Than 90 Days	444	[1]	52	[1]
Total Past Due	1,486		216
Nonaccrual	0	[2]	0	[2]
Current Loans	31,208		2,394
Acquired loans	32,694		2,610
Other Loans Financing Receivable [Member] | Covered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	367		0
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	367		0
Nonaccrual	0	[2]	0	[2]
Current Loans	820		1,229
Acquired loans	1,187		1,229
Other Loans Financing Receivable [Member] | Noncovered [Member]
Acquired Loans, Aging [Abstract]
Past Due 30 - 89 Days	193		0
Past Due Greater Than 90 Days	0	[1]	0	[1]
Total Past Due	193		0
Nonaccrual	0	[2]	0	[2]
Current Loans	14,693		100
Acquired loans	$ 14,886		$ 100

[1] Past due greater than 90 days but still accruing interest.

[2] Acquired loans not accounted for under FASB ASC Topic 310-30.