Summary Of Significant Accounting Policies (Amortized Cost And Fair Value Of Short-Term Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Accounting Policies [Abstract]
Due in one year or less, Amortized Cost	$ 22,410
Due in one year or less, Estimated Fair Value	22,414
Due after one through two years, Amortized Cost	38,628
Due after one through two years, Estimated Fair Value	38,660
Total short-term investments, Amortized Cost	61,038
Total short-term investments, Estimated Fair Value	$ 61,074