Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income (loss)	$ (181)	$ 36,344
Adjustments to reconcile net income to cash used in operating activities:
Depreciation and amortization	41,379	36,596
Bad debt expense	491	484
Equity in losses (earnings) of affiliates, net of dividends	7,181	(1,980)
Gain on sale of investments	(685)	0
Gains on sales of Rail Group assets and related leases	(4,725)	(9,213)
Excess tax benefit from share-based payment arrangement	0	(1,299)
Deferred income taxes	(1,601)	10,736
Stock-based compensation expense	3,696	1,988
Other	234	833
Changes in operating assets and liabilities:
Accounts receivable	(43,650)	(42,209)
Inventories	224,368	312,341
Commodity derivatives	(60,443)	27,835
Other assets	35,612	17,173
Trade and other payables	(396,037)	(449,027)
Net cash provided by (used in) operating activities	(194,361)	(59,398)
Investing Activities
Acquisition of business, net of cash acquired	0	124,328
Purchases of Rail Group assets	(27,504)	(53,756)
Proceeds from sale of Rail Group assets	10,397	26,355
Purchases of property, plant and equipment	(34,443)	(28,214)
Proceeds from sale of property, plant and equipment	173	453
Proceeds from sale of investments	15,013	1,866
Proceeds from sale of facilities	(54,330)	0
Purchase of Investments	2,523	0
Change in restricted cash	(538)	(513)
Net cash provided by (used in) investing activities	14,905	(178,137)
Financing Activities
Net change in short-term borrowings	164,000	138,000
Proceeds from issuance of long-term debt	77,564	151,608
Payments of long-term debt	(85,177)	(82,014)
Purchase of treasury stock	0	(34,160)
Distributions to noncontrolling interest owner	0	(1,700)
Proceeds from sale of treasury shares to employees and directors	1,282	426
Payments of debt issuance costs	(309)	(271)
Dividends paid	(8,679)	(8,044)
Excess tax benefit from share-based payment arrangement	0	1,299
Other	(1,592)	(1,540)
Net cash provided by (used in) financing activities	147,089	163,604
Decrease in cash and cash equivalents	(32,367)	(73,931)
Cash and cash equivalents at beginning of period	63,750	114,704
Cash and cash equivalents at end of period	$ 31,383	$ 40,773