New Accounting Guidance (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New Accounting Guidance
ROU assets	$ 23,457	$ 36,800
Lease liabilities	$ 25,173	$ 36,800
ASU 2016-02
New Accounting Guidance
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
ASU 2018-07
New Accounting Guidance
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
ASU 2018-13
New Accounting Guidance
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	true
ASU 2018-15
New Accounting Guidance
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
ASU 2019-12
New Accounting Guidance
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false