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Segment and Geographic Information Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | $ 1,177,438 |  | $ 1,014,152 |  | $ 794,585 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  | 40,389 |  | 32,196 |  | 27,915 |
Operating income (loss) | 39,781 |  | 35,886 | 32,979 | 27,351 | 32,837 |  | 32,032 | 33,083 | 23,861 | 135,997 |  | 121,813 |  | 89,994 |
Total assets (1) | 1,461,630 | [1] |  |  |  | 1,327,841 | [1] |  |  |  | 1,461,630 | [1] | 1,327,841 | [1] | 1,174,475 | [1]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 72,585 |  | 43,685 |  | 22,380 |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 224,205 |  |  |  |  | 169,776 |  |  |  |  | 224,205 |  | 169,776 |  | 137,301 |
Energy & Chemicals [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 318,510 |  | 323,676 |  | 205,033 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  | 8,564 |  | 7,877 |  | 7,417 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  | 59,671 |  | 64,931 |  | 27,489 |
Total assets (1) | 277,760 | [1] |  |  |  | 203,044 | [1] |  |  |  | 277,760 | [1] | 203,044 | [1] | 203,067 | [1]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 34,194 |  | 9,519 |  | 5,228 |
Distribution & Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 592,616 |  | 475,576 |  | 390,332 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  | 15,237 |  | 12,599 |  | 11,767 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  | 93,560 |  | 79,175 |  | 61,415 |
Total assets (1) | 676,484 | [1] |  |  |  | 607,252 | [1] |  |  |  | 676,484 | [1] | 607,252 | [1] | 556,688 | [1]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 32,039 |  | 30,048 |  | 7,808 |
BioMedical [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 266,312 |  | 214,900 |  | 199,220 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  | 14,618 |  | 10,204 |  | 7,588 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  | 33,039 |  | 24,079 |  | 35,911 |
Total assets (1) | 431,763 | [1] |  |  |  | 447,792 | [1] |  |  |  | 431,763 | [1] | 447,792 | [1] | 226,729 | [1]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 3,370 |  | 2,717 |  | 6,692 |
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  | 1,970 |  | 1,516 |  | 1,143 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  | (50,273) |  | (46,372) |  | (34,821) |
Total assets (1) | 75,623 | [1] |  |  |  | 69,753 | [1] |  |  |  | 75,623 | [1] | 69,753 | [1] | 187,991 | [1]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 2,982 |  | 1,401 |  | 2,652 |
Heat exchangers - Brazed aluminum [Member] | Energy & Chemicals [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 170,104 |  | 146,110 |  | 92,013 |
Heat exchangers - Air cooled [Member] | Energy & Chemicals [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 54,275 |  | 69,977 |  | 66,962 |
Cold boxes [Member] | Energy & Chemicals [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 94,131 |  | 107,589 |  | 46,058 |
Cryogenic bulk storage systems [Member] | Distribution & Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 175,123 |  | 153,372 |  | 153,518 |
Cryogenic packaged gas systems and beverage liquid CO2 systems [Member] | Distribution & Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 152,922 |  | 143,548 |  | 142,262 |
LNG applications [Member] | Distribution & Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 193,032 |  | 107,231 |  | 35,678 |
Cryogenic systems, components and services [Member] | Distribution & Storage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 71,539 |  | 71,425 |  | 58,874 |
Medical respiratory products [Member] | BioMedical [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 175,233 |  | 143,878 |  | 138,411 |
Biological storage systems [Member] | BioMedical [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 61,493 |  | 64,449 |  | 60,809 |
On-site oxygen generation systems [Member] | BioMedical [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 29,586 |  | 6,573 |  | 0 |
United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 479,067 |  | 438,294 |  | 334,517 |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 146,610 |  |  |  |  | 98,425 |  |  |  |  | 146,610 |  | 98,425 |  | 75,848 |
China [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 231,143 |  | 149,010 |  | 92,142 |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 38,569 |  |  |  |  | 34,158 |  |  |  |  | 38,569 |  | 34,158 |  | 23,410 |
Rest of World [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers |  |  |  |  |  |  |  |  |  |  | 467,228 |  | 426,848 |  | 367,926 |
Czech Republic [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 23,623 |  |  |  |  | 21,559 |  |  |  |  | 23,623 |  | 21,559 |  | 21,805 |
Germany [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 14,618 |  |  |  |  | 14,402 |  |  |  |  | 14,618 |  | 14,402 |  | 14,672 |
Other Non-U.S. Countries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segments, Geographical Areas [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | $ 785 |  |  |  |  | $ 1,232 |  |  |  |  | $ 785 |  | $ 1,232 |  | $ 1,566 |
[1] | Corporate assets consist primarily of cash, cash equivalents and deferred income taxes.

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