Summary Of Other Investments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Schedule Of Investments [Abstract]
Short-term investments	$ 20,438	[1]	$ 20,252	[1]
Debt security, held-to-maturity	15,000	[1]	15,000	[1]
Equity investment	6,000		6,000
Total other investments	$ 41,438		$ 41,252

[1] Included in other investments on the consolidated balance sheets.