Business and Summary of Significant Accounting Policies Business and Summary of Significant accounting Policies New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
New Accounting Pronouncements [Line Items]
Deferred income tax assets, noncurrent	$ 4,667	$ 3,036
As adjusted [Member] | Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncements [Line Items]
Deferred income tax assets, current		0
Deferred income tax assets, noncurrent		3,036
Deferred income tax liabilities, noncurrent		0
As reported [Member] | Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncements [Line Items]
Deferred income tax assets, current		15,535
Deferred income tax assets, noncurrent		0
Deferred income tax liabilities, noncurrent		$ 12,499