Certain Financial Statement Information - Short-Term Investments Schedule of Maturities (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Schedule of cost and estimated fair values of available-for-sale securities with stated maturities by contractual maturity
Less than 1 year, Cost	$ 13,471
Mature in 1 - 2 years, Cost	34,118
Mature in 3 - 5 years, Cost	8,823
Mature after 5 years, Cost	1,200
Cost, Total	57,612
Less than 1 year, Fair Value	13,471
Mature in 1 - 2 years, Fair Value	34,386
Mature in 3 - 5 years, Fair Value	9,023
Mature after 5 years, Fair Value	1,206
Fair Value, Total	$ 58,086