Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	1 Months Ended
Feb. 28, 2018	Jan. 31, 2018
Accounting Policies [Abstract]
Cumulative effect adjustment from accumulated other comprehensive income to retained earnings	$ 634	$ 1,700

Amount of the cumulative effect on retained earnings net of related income tax effect.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794

Name:	us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration