CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities:
Net income (loss)	$ 87,296	$ (265,400)	$ 86,148
Adjustments to reconcile net (loss) income to net cash from operating activities:
Goodwill and intangible asset impairment		376,574
Depreciation	43,383	40,583	32,193
Amortization of intangible assets and debt issuance costs	16,027	20,874	15,438
Stock-based compensation expense	6,623	9,470	8,818
Excess income tax benefit from stock-based compensation	(1,148)		(18)
Deferred income taxes	9,009	(25,606)	10,854
Adjustment interest rate swap to fair value		264
Adjustment of investments to fair value			4,750
Loss on sale of investments		2,699	10
Loss (gain) on sale of property and equipment	49	316	(726)
Gain on bargain purchase			(47)
Other long-term liabilities	23,107	(5,104)	(13,819)
Other non-cash items	(3,719)	148	(601)
(Increase) decrease in:
Accounts receivable	(62,991)	50,655	6,657
Costs and estimated earnings in excess of billings	(107,983)	(106,604)	(80,670)
Other current assets	25,250	2,237	6,631
Increase (decrease) in:
Accounts payable	59,169	(89,252)	(45,278)
Billings in excess of costs and estimated earnings	(36,835)	(82,521)	(25,310)
Accrued expenses	(6,509)	2,804	(36,650)
NET CASH PROVIDED (USED) BY OPERATING ACTIVITIES	50,728	(67,863)	(31,620)
Cash Flows from Investing Activities:
Acquisitions, net of cash balance acquired			(341,898)
Acquisition of property and equipment	(42,360)	(41,352)	(66,747)
Proceeds from sale of property and equipment	2,663	11,759	10,049
Investment in available-for-sale securities		(535)
Proceeds from sale of available-for-sale securities		16,553	30,191
Change in restricted cash	(3,877)	(3,280)	(6,816)
NET CASH USED BY INVESTING ACTIVITIES	(43,574)	(16,855)	(375,221)
Cash Flows from Financing Activities:
Proceeds from debt	653,280	688,425	701,753
Repayment of debt	(676,795)	(626,122)	(554,969)
Business acquisition related payments	(31,038)	(11,462)	(1,904)
Excess income tax benefit from stock-based compensation	1,148		18
Issuance of Common stock and effect of cashless exercise	(1,882)	(308)	(191)
Debt issuance costs		(1,999)	(5,004)
NET CASH (USED) PROVIDED BY FINANCING ACTIVITIES	(55,287)	48,534	139,703
Net Decrease in Cash and Cash Equivalents	(48,133)	(36,184)	(267,138)
Cash and Cash Equivalents at Beginning of Year	168,056	204,240	471,378
Cash and Cash Equivalents at End of Year	119,923	168,056	204,240
Supplemental Disclosure of Cash Paid For:
Interest	41,207	40,183	31,379
Income taxes	28,898	16,309	53,055
Supplemental Disclosure of Non-Cash Transactions:
Grant date fair value of common stock issued for services	18,290	5,075	5,608
Property and equipment acquired through financing arrangements	$ 16,689	$ 2,050	$ 1,604