Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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SEGMENT INFORMATION - Summary of Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Summarized Information
Sales	$ 2,615,269	$ 2,563,668	$ 5,156,398	$ 5,070,206
Total consolidated operating earnings	232,065	305,589	527,553	622,681
Total assets	5,861,881		5,861,881		$ 5,694,307
UNITED STATES
Summarized Information
Sales	1,900,646	1,896,100	3,759,018	3,779,868
Total assets	2,334,275		2,334,275		2,275,009
CANADA
Summarized Information
Sales	189,123	194,368	375,251	373,103
Total assets	289,060		289,060		286,035
Other Businesses [Member]
Summarized Information
Sales	525,500	473,200	1,022,129	917,235
Total assets	563,315		563,315		494,067
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Summarized Information
Sales	2,714,826	2,647,126	5,351,818	5,237,498
Total consolidated operating earnings	270,340	350,921	597,588	692,215
Total assets	3,186,650		3,186,650		$ 3,055,111
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] \| UNITED STATES
Summarized Information
Sales	1,999,153	1,978,542	3,952,597	3,944,809
Total consolidated operating earnings	312,289	348,938	624,759	680,795
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] \| CANADA
Summarized Information
Sales	189,113	194,418	375,254	373,189
Total consolidated operating earnings	(27,727)	(27,741)	(44,456)	(40,088)
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] \| Other Businesses [Member]
Summarized Information
Sales	526,560	474,166	1,023,967	919,500
Total consolidated operating earnings	(14,222)	29,724	17,285	51,508
Intersegment Eliminations [Member]
Summarized Information
Sales	(99,557)	(83,458)	(195,420)	(167,292)
Intersegment Eliminations [Member] \| UNITED STATES
Summarized Information
Sales	(98,507)	(82,442)	(193,579)	(164,941)
Intersegment Eliminations [Member] \| CANADA
Summarized Information
Sales	10	(50)	(3)	(86)
Intersegment Eliminations [Member] \| Other Businesses [Member]
Summarized Information
Sales	$ (1,060)	$ (966)	$ (1,838)	$ (2,265)