Financial Instruments And Investments (Contractual Year For Maturity Of Available-For-Sale Securities ) (Details) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Collateralized Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Contractual Maturity Due For, Mortgaged Backed Securities	10 years
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Total	$ 30,155
2015	515
2016 through 2019	10,772
2020 through 2024	13,095
2025 and Beyond	5,773
Corporate Debt Obligations
Schedule of Available-for-sale Securities [Line Items]
Total	20,174
2015	705
2016 through 2019	5,763
2020 through 2024	7,530
2025 and Beyond	6,176
U.S. Government Bonds
Schedule of Available-for-sale Securities [Line Items]
Total	43,397
2015	3,052
2016 through 2019	17,460
2020 through 2024	13,612
2025 and Beyond	$ 9,273
Minimum | Collateralized Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Debt Instrument, Expected Weighted Average Maturity Year	2 years
Maximum | Collateralized Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Debt Instrument, Expected Weighted Average Maturity Year	6 years