Long Term Investments Cost Method Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cost Method Investments [Roll Forward]
Cost Method Investments, Beginning Balance	$ 25,162	$ 18,353
Contributions	12,000	5,000
Distributions	(549)	(769)
Realized gain on liquidation of long-term investments	0	189
Unrealized gains reclassified into net income	0	(189)
Unrealized gain on long-term investments	2,534	2,578
Net change in long-term investments	2,534	2,389
Cost Method Investments, Ending Balance	$ 39,147	$ 25,162