Basis of Presentation and Summary of Significant Accounting Policies (Investments Included in Other Assets) (Details) (USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
Basis of Presentation and Summary of Significant Accounting Policies
Available-for-sale securities, cost basis	$ 4,557		$ 4,133
Other-than-temporary unrealized loss	(825)
Unrealized loss	(2,940)		(73)
Available-for-sale securities, fair-value (1)	792	[1]	4,060	[1]
Cost meth securities, cost basis	2,050
Total equity securities	$ 2,842		$ 4,060

[1] Determination of fair-value is classified as Level 1 in the fair-value hierarchy based on the use of quoted prices in active markets.