CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 6,828	$ 12,721
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,842	13,782
Interest expense related to amortization of debt issue costs and debt discount	930	567
Stock-based compensation	485	708
Deferred income taxes	3,910	6,482
Tax benefit from exercise of stock appreciation rights and vesting of restricted stock	(5,257)	(64)
Net gain on disposition of property, plant and equipment	(114)	(47)
Net loss of unconsolidated joint venture	12	13
Decrease in trade receivables	33,812	43,521
Increase in inventories	(8,127)	(1,259)
Decrease in accounts payable and accrued liabilities	(21,139)	(34,434)
Other changes in operating assets and liabilities, net	(1,521)	(423)
Net cash provided by (used in) operating activities	27,661	41,567
Cash flows from investing activities:
Business acquisitions, net of cash acquired	0	(57,301)
Purchase of property, plant and equipment	(15,540)	(7,685)
Proceeds from disposition of property, plant and equipment	162	95
Net decrease (increase) in long-term receivables and deposits	851	(1,301)
Net change in other assets	1,832	(1,357)
Net cash provided by (used in) investing activities	(12,695)	(67,549)
Cash flows from financing activities:
Payments on long-term debt	(15,000)	(1,062)
Dividends paid to non-controlling interest in consolidated subsidiary	0	(355)
Employee stock purchases	337	374
Tax benefit from exercise of stock appreciation rights and vesting of restricted stock	5,257	64
Net cash provided by (used in) financing activities	(9,406)	(979)
Net increase (decrease) in cash and cash equivalents	5,560	(26,961)
Cash and cash equivalents, beginning of period	65,298	142,597	$ 142,597
Cash and cash equivalents, end of period	$ 70,858	$ 115,636	$ 65,298