Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

No definition available.

Name:	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2018	Mar. 31, 2018	Jan. 01, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Amounts reclassified to accumulated other comprehensive income (loss) from retained earnings due to the stranded tax effects of the 2017 Tax Cuts and Jobs Act	$ 286	$ 286
Retained Earnings \| Accounting Standards Update 2016-09, Forfeiture Rate Component
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ 170