Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net earnings	$ 16,752	$ 34,087
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	57,510	48,630
Amortization of loan costs	3,803	1,636
Stock-based compensation	1,942	1,034
Deferred income taxes	11,835	2,278
Income tax benefit from stock-based compensation	6
Income tax benefit from parent company interest		4,440
Fair value change in interest rate hedges	(1,410)
Amortization of other comprehensive loss	2,057
Gain on disposal of assets, net	(678)	(885)
Loss (earnings) from discontinued operations, net	(315)	6,054
Changes in operating assets and liabilities, net of the effect of acquisitions and dispositions:
Accounts receivable, net	(78,621)	(23,461)
Inventories, prepaid expenses and other current assets	1,840	4,461
Accounts payable, other accrued expenses and other accrued liabilities	(15,143)	19,435
Net cash provided by (used in) operating activities - continuing operations	(422)	97,709
Net cash used in operating activities - discontinued operations	(214)	(231)
Net cash provided by (used in) operating activities	(636)	97,478
Cash flows from investing activities
Purchases of property and equipment, net	(53,248)	(42,234)
Cash paid for acquisitions, net	228	(12,804)
Proceeds from sale of assets	62	150
Change in other assets, net	1,542	1,639
Net cash used in investing activities	(51,416)	(53,249)
Cash flows from financing activities
Payment of debt and capital lease obligations	(7,267)	(3,810)
Debt financing costs incurred	(998)
Distributions to non-controlling interests	(4,887)	(5,689)
Costs paid for the repurchase of non-controlling interests, net	(462)	(625)
Net cash used in financing activities	(13,614)	(10,124)
Change in cash and cash equivalents	(65,666)	34,105
Cash and cash equivalents at beginning of period	147,327	144,511
Cash and cash equivalents at end of period	81,661	178,616
Supplemental disclosure of cash flow information
Cash paid for interest	66,647	31,846
Cash received for income taxes, net	12,102	241
Supplemental disclosure of non-cash investing and financing activities
Capital lease obligations resulting from acquisition		$ 1,896