Organization and Summary of Significant Accounting Policies - ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Corporate tax rate (as a percent)		35.00%	35.00%	35.00%
Expected
New Accounting Pronouncement, Early Adoption [Line Items]
Corporate tax rate (as a percent)	21.00%
Expected | Accounting Standards Update 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income | Early adoption effect | Retained Earnings
New Accounting Pronouncement, Early Adoption [Line Items]
Reclassification of tax effects stranded in accumulated other comprehensive income	$ 20.1
Expected | Accounting Standards Update 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income | Early adoption effect | Accumulated Other Comprehensive Loss
New Accounting Pronouncement, Early Adoption [Line Items]
Reclassification of tax effects stranded in accumulated other comprehensive income	$ (20.1)