CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities:
Net (loss) income	$ (265,400)	$ 86,148	$ 103,500
Adjustments to reconcile net (loss) income to net cash from operating activities:
Goodwill and intangible assets impairment	376,574	0	0
Depreciation	40,583	32,193	21,380
Amortization of intangible assets and debt issuance costs	20,874	15,438	9,954
Stock-based compensation expense	9,470	8,818	12,752
Adjustment of interest rate swap to fair value	264	0	0
Adjustment of investments to fair value	0	4,750	5,742
Excess income tax benefit from stock-based compensation	0	(18)	(218)
Deferred income taxes	(25,606)	10,854	(3,826)
Loss on sale of investments	2,699	10	312
Gain on bargain purchase	0	(47)	0
(Loss) gain on sale of property and equipment	316	(726)	962
Other non-cash items	148	(601)	(86)
Other long-term liabilities	(5,104)	(13,819)	(5,353)
(Increase) decrease in:
Accounts receivable	50,655	6,657	(22,054)
Costs and estimated earnings in excess of billings	(106,604)	(80,670)	7,144
Other current assets	2,237	6,631	(4,690)
Increase (decrease) in:
Accounts payable	(89,252)	(45,278)	(101,143)
Billings in excess of costs and estimated earnings	(82,521)	(25,310)	11,957
Accrued expenses	2,804	(36,650)	(10,791)
NET CASH (USED) PROVIDED BY OPERATING ACTIVITIES	(67,863)	(31,620)	25,542
Cash Flows from Investing Activities:
Acquisitions, net of cash balance acquired	0	(341,898)	(30,924)
Acquisition of property and equipment	(41,352)	(66,747)	(25,200)
Proceeds from sale of property and equipment	11,759	10,049	1,811
Investment in available-for-sale securities	(535)	0	0
Proceeds from sale of available-for-sale securities	16,553	30,191	7,066
Change in restricted cash	(3,280)	(6,816)	(23,550)
NET CASH USED BY INVESTING ACTIVITIES	(16,855)	(375,221)	(70,797)
Cash Flows from Financing Activities:
Proceeds from issuance of senior unsecured notes, net of debt discount	0	0	297,774
Proceeds from debt	688,425	701,753	6,803
Repayment of debt	(626,122)	(554,969)	(35,760)
Business acquisition related payments	(11,462)	(1,904)	(6,004)
Purchase of common stock under share repurchase program	0	0	(39,391)
Common stock dividend paid	0	0	(47,090)
Excess income tax benefit from stock-based compensation	0	18	218
Issuance of Common stock and effect of cashless exercise	(308)	(191)	(325)
Debt issuance costs	(1,999)	(5,004)	(7,901)
NET CASH PROVIDED BY FINANCING ACTIVITIES	48,534	139,703	168,324
Net Increase (Decrease) in Cash and Cash Equivalents	(36,184)	(267,138)	123,069
Cash and Cash Equivalents at Beginning of Year	204,240	471,378	348,309
Cash and Cash Equivalents at End of Year	168,056	204,240	471,378
Supplemental Disclosure of Cash Paid For:
Interest	40,183	31,379	6,151
Income taxes	16,309	53,055	48,421
Supplemental Disclosure of Non-Cash Transactions:
Grant date fair value of common stock issued for services	5,075	5,608	19,673
Assets acquired through financing arrangements	$ 2,050	$ 1,604	$ 10,784