Summary of Significant Accounting Policies - Share-Based Compensation (Details) - Restricted Stock	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Share-based compensation
Compensation expense before tax	$ 306,000	$ 1,070,000
Compensation expense after tax	211,000	(713,000)
Unrecognized compensation expense	$ 2,690,000	$ 2,690,000

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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