CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES
Net loss	$ (18,162)	$ (12,787)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	19,320	17,918
Other amortization	57	73
Share-based compensation expense	1,442	1,446
Provision for losses on accounts receivable	275	298
Deferred income tax benefit	(4,301)	(6,606)
Gain on sale of property and equipment	(285)	(95)
Changes in operating assets and liabilities:
Receivables	(859)	(16,174)
Prepaid expenses	(1,621)	(1,840)
Other assets	(153)	(168)
Income taxes	1,793	(974)
Accounts payable, accrued expenses and other liabilities	7,371	12,555
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	4,877	(6,354)
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(2,388)	(2,586)
Proceeds from sales of property and equipment	1,315	612
Purchases of short-term investments	(14,335)	(5,880)
Proceeds from sales of short-term investments	3,185	2,940
Capitalization of internally developed software and other	(1,618)	(1,027)
NET CASH USED IN INVESTING ACTIVITIES	(13,841)	(5,941)
FINANCING ACTIVITIES
Payments on long-term debt	(6,075)	(3,443)
Net change in bank overdraft and other	(10,056)	127
Change in restricted cash equivalents and short-term investments	23,149	(31)
Deferred financing costs	(36)	(127)
Payment of common stock dividends	(797)	(788)
Proceeds from the exercise of stock options		763
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	6,185	(3,499)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2,779)	(15,794)
Cash and cash equivalents at beginning of period	141,295	102,578
CASH AND CASH EQUIVALENTS AT END OF PERIOD	138,516	86,784
NONCASH INVESTING ACTIVITIES
Accruals for equipment received	$ 2,060	$ 2,145