Non-cash increase of lease modification.

No definition available.

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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- Definition

Amount of expense for amortization of capitalized computer software costs.

+ References

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-Name Accounting Standards Codification
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- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

+ References

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,381,512	$ 1,350,768
Accumulated depreciation and amortization	(919,457)	(896,466)
Property, plant and equipment, net	462,055	454,302	$ 422,564
Expenditures for maintenance and repairs	19,400	19,100	16,600
Depreciation expense	68,800	61,517	58,106
Software amortization	3,200	3,600	4,000
Capital expenditures and purchased software	82,886	87,637	$ 73,492
Unamortized software cost	6,900	7,600
Salt Lake City, Utah [Member]
Property, Plant and Equipment [Line Items]
Non-cash increase of lease modification	$ 12,700
Lease expiration date	Dec. 31, 2029
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,287	14,853
Estimated useful life	25 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 245,805	239,127
Buildings [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Buildings [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 989,925	950,519
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,091	8,861
Estimated useful life	5 years
Computer and Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 16,473	15,610
Computer and Other Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer and Other Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 60,182	57,847
Software [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Software [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 46,749	$ 63,951