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Financial Statements (Narratives) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle      
Accumulated other comprehensive loss $ (24,896)   $ (22,191)
Retained earnings $ 131,275   $ 114,324
ASU 2018-02 | Reclassified      
New Accounting Pronouncements or Change in Accounting Principle      
Accumulated other comprehensive loss   $ (633)  
Retained earnings   $ 633