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Employee Benefit Plans Level 3 (Tables)
 6 Months Ended
Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic benefit cost
 
Pension Benefits
Other Postretirement Benefits
 
Three Months Ended June 30,
Three Months Ended June 30,
 
2016
2015
2016
2015
Service cost
$
1

$
1

$
—

$
—

Interest cost
59

58

3

3

Expected return on plan assets
(76
)
(78
)
(3
)
(3
)
Amortization of prior service credit
—

—

(1
)
(1
)
Amortization of actuarial loss
13

14

1

1

Net periodic benefit
$
(3
)
$
(5
)
$
—

$
—