Commitments and Contingencies (Lease Obligations) (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
Capital Leased Assets [Line Items] | ||||
Extended lease term | 3 years | |||
Capital leases increase in future minimum payments due | $ 13.7 | |||
Rent expense | $ 34.7 | $ 26.6 | $ 27.9 | |
Land, Buildings and Improvements [Member] | Los Gatos Buildings [Member] | ||||
Capital Leased Assets [Line Items] | ||||
Total costs of buildings and improvements | 40.7 | |||
Capital lease obligations | 29.0 | |||
Capital leases, future minimum payments due | 21.1 | |||
Capital lease financing obligation under extended lease term | 21.8 | |||
Land, Buildings and Improvements [Member] | Los Gatos Buildings Expanded Site and Los Angeles [Member] | ||||
Capital Leased Assets [Line Items] | ||||
Capital leases, future minimum payments due | $ 428.7 |