Accounting Policies (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Right of use assets	$ 21,200
Lease liabilities	$ 21,181
ASU 2016-02 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Right of use assets		$ 20,700
Lease liabilities		$ 20,700