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Recent Accounting Developments (Narratives) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle\
ROU assets	$ 18,490
Lease liability	$ 19,901
Prepaid rent			$ 1,400
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle\
ROU assets		$ 18,600
Lease liability		$ 20,000

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

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