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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from (used for) operating activities:
Net income	$ 4,746	$ 35,076
Adjustments to reconcile net income to net cash from (used for) operating activities -
Depreciation and amortization	14,597	13,199
(Gain) loss on disposition of property and equipment	(195)	29
Stock-based compensation	1,898	1,348
Other long-term assets	(3,154)	(825)
Other long-term liabilities	1,602	3,176
	19,494	52,003
Changes in working capital:
Accounts receivable	7,676	(74,076)
Inventories	86,221	(76,122)
Prepaid expenses and other	3,213	4,176
Accounts payable	(12,160)	36,926
Change in outstanding checks	5,403	(10,039)
Accrued payroll and other accrued liabilities	(10,492)	3,995
	79,861	(115,140)
Net cash from (used for) operating activities	99,355	(63,137)
Cash flows from (used for) investing activities:
Acquisition	(11,133)	(21,907)
Capital expenditures	(7,479)	(20,366)
Proceeds from disposition of property and equipment	234	80
Net cash used for investing activities	(18,378)	(42,193)
Cash flows from (used for) financing activities:
Credit facility revolver borrowings	433,742	428,782
Credit facility revolver repayments	(513,269)	(320,534)
Industrial revenue bond repayments		(930)
Credit facility fees and expenses	(100)	(70)
Repurchase of common stock	(1,522)
Dividends paid	(659)	(660)
Net cash from (used for) financing activities	(81,808)	106,588
Cash and cash equivalents:
Net change	(831)	1,258
Beginning balance	9,319	3,009
Ending balance	8,488	4,267
Interest paid	8,849	7,171
Income taxes paid	$ 351	$ 8,216

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Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Credit facility fees and expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount of increase (decrease) in other long-term assets during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the increase (decrease) in other long-term liabilities during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash inflow (outflow) from operating activities, including discontinued operations, but not including changes in working capital. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration