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Allowance for Loan Losses (Tables)
12 Months Ended
Dec. 31, 2014
Receivables [Abstract]  
Schedule of Allowance for Loan Losses by Portfolio Segment
The following table presents a summary of changes in the allowance for loan losses by portfolio segment:
Year ended December 31, 2014
Real Estate
Consumer
Commercial
Agriculture
Other
Total
Allowance for loan losses:
 
 
 
 
 
 
Beginning balance
$
63,923

$
6,193

$
14,747

$
476

$

$
85,339

Provision charged (credited) to operating
   expense
(10,348
)
1,382

1,809

535


(6,622
)
Less loans charged-off
(3,014
)
(4,887
)
(6,030
)
(64
)

(13,995
)
Add back recoveries of loans previously charged-off
3,323

2,347

3,781

27


9,478

Ending balance
$
53,884

$
5,035

$
14,307

$
974

$

$
74,200

 
 
 
 
 
 
 
Individually evaluated for impairment
$
3,961

$

$
1,190

$
641

$

$
5,792

Collectively evaluated for impairment
49,923

5,035

13,117

333


68,408

Ending balance
$
53,884

$
5,035

$
14,307

$
974

$

$
74,200

 
 
 
 
 
 
 
Total loans:
 
 
 
 
 
 
Individually evaluated for impairment
$
62,775

$

$
14,526

$
1,179

$

$
78,480

Collectively evaluated for impairment
3,203,306

762,471

725,547

123,680

3,959

4,818,963

Total loans
$
3,266,081

$
762,471

$
740,073

$
124,859

$
3,959

$
4,897,443

Year ended December 31, 2013
Real Estate
Consumer
Commercial
Agriculture
Other
Total
Allowance for loan losses:
 
 
 
 
 
 
Beginning balance
$
75,782

$
7,141

$
17,085

$
503

$

$
100,511

Provision charged (credited) to operating
   expense
(7,722
)
1,605

41

(49
)

(6,125
)
Less loans charged-off
(10,224
)
(4,612
)
(5,672
)
(5
)

(20,513
)
Add back recoveries of loans previously charged-off
6,087

2,059

3,293

27


11,466

Ending balance
$
63,923

$
6,193

$
14,747

$
476

$

$
85,339

 
 
 
 
 
 
 
Individually evaluated for impairment
$
7,339

$

$
1,504

$
86

$

$
8,929

Collectively evaluated for impairment
56,584

6,193

13,243

390


76,410

Ending balance
$
63,923

$
6,193

$
14,747

$
476

$

$
85,339

 
 
 
 
 
 
 
Total loans:
 
 
 
 
 
 
Individually evaluated for impairment
$
96,862

$

$
13,585

$
125

$

$
110,572

Collectively evaluated for impairment
2,786,254

671,587

662,959

111,747

1,734

4,234,281

Total loans
$
2,883,116

$
671,587

$
676,544

$
111,872

$
1,734

$
4,344,853


Year ended December 31, 2012
Real Estate
Consumer
Commercial
Agriculture
Other
Total
Allowance for loan losses:
 
 
 
 
 
 
Beginning balance
$
87,396

$
8,594

$
15,325

$
1,266

$

$
112,581

Provision charged (credited) to operating
   expense
28,651

1,922

10,845

(668
)

40,750

Less loans charged-off
(43,506
)
(5,320
)
(11,990
)
(120
)

(60,936
)
Add back recoveries of loans previously charged-off
3,241

1,945

2,905

25


8,116

Ending balance
$
75,782

$
7,141

$
17,085

$
503

$

$
100,511

 
 
 
 
 
 
 
Individually evaluated for impairment
$
8,350

$

$
1,919

$
28

$

$
10,297

Collectively evaluated for impairment
67,432

7,141

15,166

475


90,214

Ending balance
$
75,782

$
7,141

$
17,085

$
503

$

$
100,511

 
 
 
 
 
 
 
Total loans:
 
 
 
 
 
 
Individually evaluated for impairment
$
123,406

$

$
12,242

$
537

$

$
136,185

Collectively evaluated for impairment
2,660,420

636,794

676,511

113,090

912

4,087,727

Total loans
$
2,783,826

$
636,794

$
688,753

$
113,627

$
912

$
4,223,912