CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES:
Cash used in operating activities - continuing operations	$ (42,233)	$ (21,367)
Cash used in operating activities - discontinued operations	(3,174)	(4,631)
Net cash used in operating activities	(45,407)	(25,998)
INVESTING ACTIVITIES:
Purchases of investments	(6,300)	(4,905)
Proceeds from sale of investments	8,561	35,758
Proceeds from maturity of investments	831	831
Purchases of property and equipment	(25,486)	(32,885)
Increase in margin deposits	(2,982)	0
Other investing activities, net	52	(102)
Cash used in investing activities - continuing operations	(25,324)	(1,303)
Cash provided by investing activities - discontinued operations	1,925	20,935
Net cash provided by (used in) investing activities	(23,399)	19,632
FINANCING ACTIVITIES:
Repayment of debt	(2,789)	(5,014)
Repurchase of shares and payment of withholding taxes on RSU exercise	(1,019)
Proceeds from debt	32,000
Net cash provided by (used in) financing activities - continuing operations	28,192	(5,014)
Effect of exchange rate changes on cash	166	(1,569)
Decrease in cash and cash equivalents	(40,448)	(12,949)
Cash and cash equivalents beginning of the period	125,547	114,759
Cash and cash equivalents end of the period	85,099	101,810
Less cash and cash equivalents of discontinued operations at the end of the period	24,368	18,860
Cash and cash equivalents of continuing operations at the end of the period	60,731	82,950
SUPPLEMENTAL CASH FLOW INFORMATION:
Payment for federal, foreign and state income taxes	2,984	16
Interest paid, net of amounts capitalized	2,072	525
Non-cash investing and financing activities:
Unpaid liability incurred for construction costs	3,718
Mortgage incurred to purchase real estate	$ 360	$ 7,446