XML 85 R69.htm IDEA: XBRL DOCUMENT v3.10.0.1
Employee Benefit Plans Employee Benefit Plans 1 (Details) - Pension Plan
 12 Months Ended
Dec. 31, 2018
item
participant
Employee benefit plans  
Minimum age for eligibility under the Pension Plan | item 21
Minimum period of service for eligibility under the Pension Plan 5 years
Normal retirement benefit (as a percent) 2.00%
Number of highest consecutive years' average earnings used in computing retirement benefit 5 years
Maximum number of years of credited service considered in determining retirement benefit 40 years
Number of participants in the Pension Plan | participant 945
Eligibility for employer matching contributions, period of service 3 years
Maximum [Member]  
Employee benefit plans  
Percentage of participant's eligible pay contributed to the plan by the employer 5.25%
Minimum  
Employee benefit plans  
Percentage of participant's eligible pay contributed to the plan by the employer 3.00%