| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|
2013
|
|
Animal Nutrition
|
|
|
Human Nutrition(1)
|
|
|
Unallocated
|
|
|
Total
|
|
|
Revenue (2)
|
|
$
|
213,236
|
|
|
$
|
31,057
|
|
|
$
|
—
|
|
|
$
|
244,293
|
|
|
Cost of sales
|
|
|
136,146
|
|
|
|
25,397
|
|
|
|
—
|
|
|
|
161,543
|
|
|
Gross profit
|
|
|
77,090
|
|
|
|
5,660
|
|
|
|
—
|
|
|
|
82,750
|
|
|
Selling, general and administrative expenses including research and development)
|
|
|
2,744
|
|
|
|
6,959
|
|
|
|
17,997
|
|
|
|
27,700
|
|
|
Loss related to plant closure
|
|
|
6,597
|
|
|
|
—
|
|
|
|
—
|
|
|
|
6,597
|
|
|
Other (gains) and losses
|
|
|
140
|
|
|
|
305
|
|
|
|
(5
|
)
|
|
|
440
|
|
|
Operating income
|
|
$
|
67,609
|
|
|
$
|
(1,604
|
)
|
|
$
|
(17,992
|
)
|
|
$
|
48,013
|
|
|
Depreciation and amortization
|
|
$
|
17,946
|
|
|
$
|
2,369
|
|
|
$
|
741
|
|
|
$
|
21,056
|
|
|
Identifiable assets
|
|
$
|
277,063
|
|
|
$
|
53,093
|
|
|
$
|
1,238
|
|
|
$
|
331,394
|
|
|
Capital expenditures
|
|
$
|
19,080
|
|
|
$
|
5,350
|
|
|
$
|
366
|
|
|
$
|
24,796
|
|
|
2012
|
|
Animal Nutrition
|
|
|
Human Nutrition
|
|
|
Unallocated
|
|
|
Total
|
|
|
Revenue (3)
|
|
$
|
213,624
|
|
|
$
|
22,015
|
|
|
$
|
—
|
|
|
$
|
235,639
|
|
|
Cost of sales
|
|
|
176,588
|
|
|
|
16,995
|
|
|
|
—
|
|
|
|
193,583
|
|
|
Gross profit
|
|
|
37,036
|
|
|
|
5,020
|
|
|
|
—
|
|
|
|
42,056
|
|
|
Selling, general and administrative expenses (including research and development)
|
|
|
2,564
|
|
|
|
3,795
|
|
|
|
17,587
|
|
|
|
23,946
|
|
|
Charges related to U.S. Attorney investigation
|
|
|
7,990
|
|
|
|
—
|
|
|
|
—
|
|
|
|
7,990
|
|
|
Other (gains) and losses
|
|
|
(2,635
|
)
|
|
|
129
|
|
|
|
—
|
|
|
|
(2,506
|
)
|
|
Operating income
|
|
$
|
29,117
|
|
|
$
|
1,096
|
|
|
$
|
(17,587
|
)
|
|
$
|
12,626
|
|
|
Depreciation and amortization
|
|
$
|
15,859
|
|
|
$
|
1,315
|
|
|
$
|
825
|
|
|
$
|
17,999
|
|
|
Identifiable assets
|
|
$
|
266,307
|
|
|
$
|
27,109
|
|
|
$
|
1,880
|
|
|
$
|
295,296
|
|
|
Capital expenditures
|
|
$
|
22,810
|
|
|
$
|
1,759
|
|
|
$
|
495
|
|
|
$
|
25,064
|
|
|
2011
|
|
Animal Nutrition
|
|
|
Human Nutrition
|
|
|
Unallocated
|
|
|
Total
|
|
|
Revenue (4)
|
|
$
|
236,489
|
|
|
$
|
15,254
|
|
|
$
|
—
|
|
|
$
|
251,743
|
|
|
Cost of sales
|
|
|
187,092
|
|
|
|
9,977
|
|
|
|
—
|
|
|
|
197,069
|
|
|
Gross profit
|
|
|
49,397
|
|
|
|
5,277
|
|
|
|
—
|
|
|
|
54,674
|
|
|
Selling, general and administrative expenses (including research and development)
|
|
|
2,804
|
|
|
|
3,286
|
|
|
|
18,548
|
|
|
|
24,638
|
|
|
Charges related to U.S. Attorney investigation
|
|
|
545
|
|
|
|
—
|
|
|
|
—
|
|
|
|
545
|
|
|
Other (gains) and losses
|
|
|
(24,869
|
)
|
|
|
1
|
|
|
|
—
|
|
|
|
(24,868
|
)
|
|
Operating income
|
|
$
|
70,917
|
|
|
$
|
1,990
|
|
|
$
|
(18,548
|
)
|
|
$
|
54,359
|
|
|
Depreciation and amortization
|
|
$
|
15,098
|
|
|
$
|
648
|
|
|
$
|
684
|
|
|
$
|
16,430
|
|
|
Identifiable assets
|
|
$
|
248,672
|
|
|
$
|
27,048
|
|
|
$
|
2,110
|
|
|
$
|
277,830
|
|
|
Capital expenditures
|
|
$
|
22,542
|
|
|
$
|
566
|
|
|
$
|
244
|
|
|
$
|
23,352
|
|
|