CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net loss	$ (8,517)	$ (6,321)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	43,914	39,970
Amortization of intangibles	2,087	200
Share-based compensation expense	2,485	3,342
Provision for losses on accounts receivable	1,312	729
Deferred income tax benefit	(5,761)	(8,520)
Gain on sale of property and equipment	(391)	(516)
Changes in operating assets and liabilities:
Receivables	(26,617)	(20,885)
Prepaid expenses	1,402	1,363
Other assets	(297)	(452)
Income taxes	163	522
Accounts payable, accrued expenses, and other liabilities	18,152	4,740
NET CASH PROVIDED BY OPERATING ACTIVITIES	27,932	14,172
INVESTING ACTIVITIES
Purchases of property, plant and equipment, net of financings	(8,638)	(18,401)
Proceeds from sale of property and equipment	1,430	2,692
Purchases of short-term investments	(6,692)	(22,143)
Proceeds from sale of short-term investments	5,914	9,555
Business acquisitions, net of cash acquired	(4,146)	(180,793)
Capitalization of internally developed software and other	(4,050)	(3,435)
NET CASH USED IN INVESTING ACTIVITIES	(16,182)	(212,525)
FINANCING ACTIVITIES
Borrowings under credit facilities		100,000
Payments on long-term debt	(22,009)	(12,303)
Net change in bank overdraft and other	2,026	(5,510)
Net change in restricted cash, cash equivalents, and short-term investments	7,758	31,668
Deferred financing costs	(61)	(1,574)
Payment of common stock dividends	(1,613)	(1,605)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(13,899)	110,676
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2,149)	(87,677)
Cash and cash equivalents at beginning of period	90,702	141,295
CASH AND CASH EQUIVALENTS AT END OF PERIOD	88,553	53,618
NONCASH INVESTING ACTIVITIES
Accruals for equipment received	268	7,416
Equipment financed		$ 21,370