XML 49 R38.htm IDEA: XBRL DOCUMENT v3.19.1
Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of accumulated other comprehensive loss $ 173,793 $ 168,137 $ 156,605 $ 153,966
Unrealized Losses on Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of accumulated other comprehensive loss (541) (1,651) (2,246)  
Pension Liability        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of accumulated other comprehensive loss (7,402) (7,566) (6,035)  
Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of accumulated other comprehensive loss $ (7,943) $ (9,217) $ (8,281) $ (7,092)