Operations and Summary of Significant Accounting Policies and Estimates - Fair Value (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($) item
Operations and Summary of Significant Accounting Policies and Estimates
Number of operating vertical markets \| item	4
Transfers of financial assets into or from Level 3	$ 0
Transfers of financial liabilities into or from Level 3	$ 0

Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy.

No definition available.

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