Ownership Interests and Cost Method Investments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of financial information under the equity method of accounting
Cash and cash equivalents and Other current assets	$ 14,206	$ 28,767
Non-current assets	15,805	69,218
Total assets	35,446	111,672
Current liabilities	24,395	47,125
Non-current liabilities and Long-term debt	2,123	10,770
Stockholders' equity	(6,331)	34,818
Total liabilities and stockholders equity	35,446	111,672
Total carrying value	25,365	39,052
Cash and Cash Equivalents [Member]
Summary of financial information under the equity method of accounting
Cash and cash equivalents and Other current assets	5,435	13,687
Long-term Debt [Member]
Summary of financial information under the equity method of accounting
Non-current liabilities and Long-term debt	$ 15,259	$ 18,959