Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 5,501	$ 3,009
Accounts receivable, net	205,245	132,737
Inventories, net (includes LIFO debit of $3,337 as of June 30, 2018 and $5,337 as of December 31, 2017)	363,595	275,307
Prepaid expenses and other	5,273	8,333
Assets held for sale	750	750
Total current assets	580,364	420,136
Property and equipment, at cost	394,470	376,710
Accumulated depreciation	(236,962)	(229,062)
Net property and equipment	157,508	147,648
Intangible assets, net	27,766	22,980
Other long-term assets	13,318	13,394
Total assets	778,956	604,158
Liabilities
Current portion of long-term debt		930
Accounts payable	127,113	84,034
Accrued payroll	15,378	11,999
Other accrued liabilities	15,543	14,184
Total current liabilities	158,034	111,147
Credit facility revolver	297,674	196,235
Other long-term liabilities	11,898	12,048
Deferred income taxes	14,562	12,145
Total liabilities	482,168	331,575
Shareholders' Equity
Preferred stock
Common stock	130,417	129,453
Treasury stock	(132)	(337)
Retained earnings	166,503	143,467
Total shareholders' equity	296,788	272,583
Total liabilities and shareholders' equity	$ 778,956	$ 604,158

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682