Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 15,729	$ 197
Adjustments to reconcile net income to net cash provided by operating activities:
Noncash rent expense	(2,336)	(2,168)
Depreciation and amortization expense	17,525	16,128
Deferred income tax provision	35	276
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	(23,567)	(51,676)
Inventories	3,723	7,001
Other assets	2,521	65
Accounts payable and other liabilities	42,702	40,561
Other, net	601	1,023
Net cash provided by operating activities	56,933	11,407
Cash flows from investing activities:
Proceeds from asset sales	19,714	5,837
Capital expenditures	(40,864)	(17,010)
Acquisitions of businesses, net of cash acquired	(41,736)	(3,202)
Net cash used in investing activities	(62,886)	(14,375)
Cash flows from financing activities:
Proceeds from sale-leaseback transactions with HPT	491	268
Sale-leaseback financing obligation payments	(636)	(589)
Other	7	(11)
Net cash used in financing activities	(138)	(332)
Effect of exchange rate changes on cash	(33)	(9)
Net decrease in cash and cash equivalents	(6,124)	(3,309)
Cash and cash equivalents at the beginning of the period	224,275	85,657
Cash and cash equivalents at the end of the period	218,151	82,348
Supplemental disclosure of cash flow information:
Interest paid (including rent classified as interest and net of capitalized interest)	5,764	3,989
Income taxes paid (net of refunds)	$ 123	$ 1