Business Combinations (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
Aug. 03, 2018	Jun. 30, 2018	Jul. 01, 2017
Investment in businesses		$ 3,534	$ 10,877
Liabilities assumed		629
Debt issued for purchases of businesses		990	$ 3,099
Cash paid		2,544
Operating supplies		22
Equipment		1,869
Deposits and other		65
Intangibles		1,194
Goodwill		$ 1,013
Subsequent event [Member]
Investment in businesses	$ 6,372

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount of assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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