XML 114 R88.htm IDEA: XBRL DOCUMENT v3.6.0.2
Qualified Employee Benefit Plans - Amounts Included in Accumulated Other Comprehensive Income (Loss) (Details) - Retirement Plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Unrecognized net loss from experience different from that assumed and effects of changes and assumptions $ (46,430) $ (43,314)
Prior service cost (803) (895)
Pension and other postretirement benefit plans, accumulated other comprehensive loss, before tax (47,233) (44,209)
Income tax benefit 457 468
Accumulated other comprehensive loss $ (46,776) $ (43,741)