CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ (9,596)	$ (3,949)
Adjustments to reconcile net loss to net cash flows provided by (used in) operating activities, net of business acquisitions:
Depreciation and amortization	13,336	13,533
Amortization of deferred loan costs	463	235
Amortization of debt discount	1,630	0
Share-based employee compensation expense	1,699	1,537
Excess tax benefits from share-based payment arrangements	(230)	(137)
(Increase) decrease in accounts receivable, net	(23,190)	15,936
Increase in other current assets	(711)	(128)
Increase in accounts payable	7,436	77
Decrease in accrued salaries and benefits	(6,584)	(7,193)
Increase in other current liabilities	18,387	6,969
Other	6,469	(851)
Net cash flows provided by operating activities	9,109	26,029
Cash flows from investing activities:
Acquisition of property and equipment	(10,566)	(11,264)
Other	(1,910)	(1,918)
Net cash flows used in investing activities	(12,476)	(13,182)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	107,225	105,200
Payments of long-term debt	(103,335)	(127,078)
Deferred loan costs	(60)	(744)
Excess tax benefits from share-based payment arrangements	230	137
Exercise of stock options	163	360
Change in outstanding checks and other	(1,589)	10,257
Net cash flows provided by (used in) financing activities	2,634	(11,868)
Effect of exchange rate changes on cash	307	(354)
Net (decrease) increase in cash and cash equivalents	(426)	625
Cash and cash equivalents, beginning of period	2,584	1,759
Cash and cash equivalents, end of period	2,158	2,384
Noncash Activities:
Assets acquired through capital lease obligation	$ 5,479	$ 0