Share Buyback Program - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Oct. 04, 2019	Nov. 26, 2008
Disclosure of Repurchase Agreements [Abstract]
Common stock available for repurchase (in shares) (up to)				1,000,000	1,000,000
Common stock repurchase program (in shares)	0	36,000	151,000
Common stock repurchase cost		$ 390	$ 1,690

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant