CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
OPERATING ACTIVITIES:
Cash used in operating activities - continuing operations	$ (44,570)	$ (22,531)
Cash used in operating activities - discontinued operations	(3,514)	(4,059)
Net cash used in operating activities	(48,084)	(26,590)
INVESTING ACTIVITIES:
Purchases of investments	(8,914)	(6,574)
Proceeds from sale of investments	9,875	41,942
Proceeds from maturity of investments	831	831
Purchases of property and equipment	(31,522)	(61,757)
Increase in margin deposits	(1,598)	0
Other investing activities, net	53	23
Cash used in investing activities - continuing operations	(31,275)	(25,535)
Cash provided by investing activities - discontinued operations	11,051	25,451
Net cash used in investing activities	(20,224)	(84)
FINANCING ACTIVITIES:
Debt issuance costs		(4,107)
Repayment of debt	(8,012)	(7,508)
Repurchase of shares and payment of withholding taxes on RSU exercise	(1,020)
Proceeds from debt	51,139	18,886
Net cash provided by financing activities - continuing operations	42,107	7,271
Effect of exchange rate changes on cash	42	(982)
Decrease in cash and cash equivalents	(26,159)	(20,385)
Cash and cash equivalents beginning of the period	125,547	114,759
Cash and cash equivalents end of the period	99,388	94,374
Less cash and cash equivalents of discontinued operations at the end of the period	14,179	22,673
Cash and cash equivalents of continuing operations at the end of the period	85,209	71,701
SUPPLEMENTAL CASH FLOW INFORMATION:
Payment for federal, foreign and state income taxes	3,026	16
Interest paid, net of amounts capitalized	2,569	97
Non-cash investing and financing activities:
Mortgage incurred to purchase real estate	$ 11,058	$ 5,276