Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income (loss)	$ 9,840	$ 6,563	$ 12,194	$ 3,974	$ 16,403	$ 16,168
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for losses on accounts receivable					0	169
Reversal of gain on sales to equity method investee					0	(11)
Depreciation and amortization					44,916	43,238
Deferred income tax expense					(2,934)	6,312
Income tax expense arising from restricted share vesting and stock options exercised					(314)	(581)
Stock-based compensation expense					1,931	1,712
Income from equity method investment	(4,268)		(4,094)		(8,044)	(7,770)	$ (8,044)	$ (7,770)
Return on investment from equity method investee					1,470	0
Loss on disposition of property and equipment					1,021	1,539
Changes in operating assets and liabilities:
Receivables and advances					(8,102)	(8,133)
Prepaid expenses and other assets					(4,690)	(7,105)
Inventory and supplies					258	(757)
Insurance and claims accrual					3,554	7,702
Accounts payable and accrued expenses					1,268	(8,382)
Net cash flows provided by operating activities					46,737	44,101
Cash flows used by investing activities:
Acquisition, net of cash acquired					0	(4,556)
Other investments					(715)	(299)
Purchase of property and equipment					(69,864)	(98,896)
Proceeds from disposition of property and equipment					17,054	17,280
Net cash flows used by investing activities					(53,525)	(86,471)
Cash flows from financing activities:
Change in checks outstanding in excess of bank balances					1,717	1,185
Cash dividend					(3,655)	(2,891)
Proceeds from notes payable					44,923	89,411
Repayments of notes payable					(55,515)	(28,053)
Repayments of finance lease obligations					(365)	(364)
Proceeds under revolving credit facility					48,177	52,178
Repayments under revolving credit facility					(23,620)	(63,757)
Payment of contingent consideration liability					(4,582)	(7,023)
Proceeds from exercise of stock options					400	1,009
Payment of minimum tax withholdings on stock compensation					(607)	(339)
Common stock repurchased					(35,561)	0
Net cash flows (used in) provided by financing activities					(28,688)	41,356
Net change in cash and cash equivalents					(35,476)	(1,014)
Cash and cash equivalents at beginning of period		$ 35,619		$ 2,294	35,619	2,294	1,280
Cash and cash equivalents at end of period	$ 143		$ 1,280		$ 143	$ 1,280	$ 143	$ 1,280