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Segment and Geographic Information (Tables) | 12 Months Ended
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Dec. 31, 2014
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment |
| Year Ended December 31, 2014
| Energy & Chemicals |  | Distribution & Storage |  | BioMedical |  | Corporate |  | Total
Sales to external customers | $ | 388,018 |  |  | $ | 578,806 |  |  | $ | 226,128 |  |  | $ | — |  |  | $ | 1,192,952 |
Depreciation and amortization expense | 9,649 |  |  | 16,749 |  |  | 13,842 |  |  | 2,936 |  |  | 43,176 |
Operating income (loss) (1) | 79,665 |  |  | 85,213 |  |  | 25,694 |  |  | (52,415 | ) |  | 138,157 |
Total assets (2) | 322,936 |  |  | 666,451 |  |  | 396,320 |  |  | 76,356 |  |  | 1,462,063 |
Capital expenditures | 24,834 |  |  | 29,583 |  |  | 3,484 |  |  | 4,234 |  |  | 62,135 |
| Year Ended December 31, 2013
| Energy & Chemicals |  | Distribution & Storage |  | BioMedical |  | Corporate |  | Total
Sales to external customers | $ | 318,510 |  |  | $ | 592,616 |  |  | $ | 266,312 |  |  | $ | — |  |  | $ | 1,177,438 |
Depreciation and amortization expense | 8,564 |  |  | 15,237 |  |  | 14,618 |  |  | 1,970 |  |  | 40,389 |
Operating income (loss) | 59,671 |  |  | 93,560 |  |  | 33,039 |  |  | (50,273 | ) |  | 135,997 |
Total assets (2) | 277,760 |  |  | 676,484 |  |  | 431,763 |  |  | 75,623 |  |  | 1,461,630 |
Capital expenditures | 34,194 |  |  | 32,039 |  |  | 3,370 |  |  | 2,982 |  |  | 72,585 |
| Year Ended December 31, 2012
| Energy & Chemicals |  | Distribution & Storage |  | BioMedical |  | Corporate |  | Total
Sales to external customers | $ | 323,676 |  |  | $ | 475,576 |  |  | $ | 214,900 |  |  | $ | — |  |  | $ | 1,014,152 |
Depreciation and amortization expense | 7,877 |  |  | 12,599 |  |  | 10,204 |  |  | 1,516 |  |  | 32,196 |
Operating income (loss) | 64,931 |  |  | 79,175 |  |  | 24,079 |  |  | (46,372 | ) |  | 121,813 |
Total assets (2) | 203,044 |  |  | 607,252 |  |  | 447,792 |  |  | 69,753 |  |  | 1,327,841 |
Capital expenditures | 9,519 |  |  | 30,048 |  |  | 2,717 |  |  | 1,401 |  |  | 43,685 |
_______________
(1) | The BioMedical segment’s operating income included recovery of $5,003 increasing operating income for the year ended December 31, 2014 from an escrow settlement for alleged breaches of representations and warranties relating to warranty costs (which are in excess of the settlement amount) for certain product lines acquired from AirSep in 2012.
(2) | Corporate assets consist primarily of cash, cash equivalents and deferred income taxes.
Schedule of Goodwill [Table Text Block] | The following table represents the changes in goodwill:
| December 31,
| 2014 |  | 2013
Beginning balance | $ | 398,905 |  |  | $ | 398,941 |
Foreign currency translation adjustments and other | (2,676 | ) |  | (344 | )
Goodwill acquired during the year | 9,293 |  |  | 308 |
Ending balance | $ | 405,522 |  |  | $ | 398,905 |
The following table represents the changes in goodwill by segment:
| Energy & Chemicals |  | Distribution & Storage |  | BioMedical |  | Total
Balance at January 1, 2013 | $ | 83,215 |  |  | $ | 158,789 |  |  | $ | 156,937 |  |  | $ | 398,941 |
Foreign currency translation adjustments and other | — |  |  | 957 |  |  | (1,301 | ) |  | (344 | )
Goodwill acquired during the year | — |  |  | 308 |  |  | — |  |  | 308 |
Balance at December 31, 2013 | 83,215 |  |  | 160,054 |  |  | 155,636 |  |  | 398,905 |
Foreign currency translation adjustments and other | 130 |  |  | (2,806 | ) |  | — |  |  | (2,676 | )
Goodwill acquired during the year | 9,293 |  |  | — |  |  | — |  |  | 9,293 |
Balance at December 31, 2014 | $ | 92,638 |  |  | $ | 157,248 |  |  | $ | 155,636 |  |  | $ | 405,522 |
Revenue from External Customers by Products and Services [Table Text Block] |
| Year Ended December 31,
| 2014 |  | 2013 |  | 2012
Energy & Chemicals |  |  |  |  |
Natural gas processing (including petrochemical) applications | $ | 208,706 |  |  | $ | 175,397 |  |  | $ | 236,912 |
Liquefied natural gas applications | 143,870 |  |  | 114,567 |  |  | 55,625 |
Industrial gas applications | 35,442 |  |  | 28,546 |  |  | 31,139 |
Energy & Chemicals Total | 388,018 |  |  | 318,510 |  |  | 323,676 |
Distribution & Storage |  |  |  |  |
Bulk industrial gas applications | 204,214 |  |  | 241,291 |  |  | 219,189 |
Packaged gas industrial applications | 164,966 |  |  | 158,293 |  |  | 149,156 |
Liquefied natural gas applications | 209,626 |  |  | 193,032 |  |  | 107,231 |
Distribution & Storage Total | 578,806 |  |  | 592,616 |  |  | 475,576 |
BioMedical |  |  |  |  |
Respiratory therapy | 141,273 |  |  | 175,233 |  |  | 143,878 |
Life sciences | 65,948 |  |  | 61,493 |  |  | 64,449 |
Commercial oxygen generation | 18,907 |  |  | 29,586 |  |  | 6,573 |
BioMedical Total | 226,128 |  |  | 266,312 |  |  | 214,900 |
Total | $ | 1,192,952 |  |  | $ | 1,177,438 |  |  | $ | 1,014,152 |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas | Net sales by geographic area are reported by the destination of sales. Net property, plant and equipment by geographic area are reported by country of domicile.
| Sales for the Year Ended December 31,
| 2014 |  | 2013 |  | 2012
United States | $ | 560,846 |  |  | $ | 479,067 |  |  | $ | 438,294 |
Foreign |  |  |  |  |
China | 188,047 |  |  | 231,143 |  |  | 149,010 |
Other foreign countries | 444,059 |  |  | 467,228 |  |  | 426,848 |
Total Foreign | $ | 632,106 |  |  | $ | 698,371 |  |  | $ | 575,858 |
Total | $ | 1,192,952 |  |  | $ | 1,177,438 |  |  | $ | 1,014,152 |
| Property, plant and equipment, net as of December 31,
| 2014 |  | 2013 |  | 2012
United States | $ | 163,425 |  |  | $ | 146,610 |  |  | $ | 98,425 |
Foreign |  |  |  |  |
Czech Republic | 22,511 |  |  | 23,623 |  |  | 21,559 |
China | 57,580 |  |  | 38,569 |  |  | 34,158 |
Germany | 13,495 |  |  | 14,618 |  |  | 14,402 |
Other foreign countries | 634 |  |  | 785 |  |  | 1,232 |
Total Foreign | $ | 94,220 |  |  | $ | 77,595 |  |  | $ | 71,351 |
Total | $ | 257,645 |  |  | $ | 224,205 |  |  | $ | 169,776 |

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