Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements.

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Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

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Amount of lessee's right to use underlying asset under operating lease.

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Nature of Operations, Background, and Basis of Presentation (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right of use assets	$ 9,583		$ 0
Operating lease obligation	11,953
Accrued rent offset to operating lease right-of-use assets	$ (2,801)			$ 0
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right of use assets		$ 10,400
Operating lease obligation		13,200
Accrued rent offset to operating lease right-of-use assets		$ 2,800