Retirement and Benefit Plans - (Details)
|
12 Months Ended |
|
Dec. 31, 2016
USD ($)
plan
Participants
Times
yr
|
Dec. 31, 2015
USD ($)
yr
|
Dec. 31, 2014
USD ($)
|
| Compensation and Retirement Disclosure [Abstract] |
|
|
|
| Company matching employee contributions |
66.70%
|
|
|
| Maximum percentage of matching contribution for total compensation |
3.00%
|
|
|
| Discretionary contributions, percentage of qualified wages |
1.00%
|
|
|
| Contribution expense |
$ 2,335,000
|
$ 2,573,000
|
$ 2,698,000
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Number of participants unaffected by plan conversion | Participants |
3
|
|
|
| Death benefit only plan, benefit payment as multiplier of final earnings | Times |
1
|
|
|
| Death benefit only plan, benefit payment as multiplier of final earnings, current employee | Times |
3
|
|
|
| Supplemental Executive Retirement Plan |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Interest credited for active participants (as a percent) |
0.00%
|
|
|
| Accumulated benefit obligation |
$ 6,003,000
|
$ 6,209,000
|
|
| Assumption, future salary increase rate |
3.25%
|
|
|
| Assumed discount rate |
4.14%
|
4.34%
|
|
| Retirement age | yr |
67
|
67
|
|
| Projected benefit obligation |
$ 6,003,000
|
$ 6,209,000
|
|
| Interest (benefit) cost |
(908,000)
|
(42,000)
|
(377,000)
|
| Net periodic benefit (income) costs |
1,073,000
|
142,000
|
|
| Benefit payments |
1,279,000
|
21,517,000
|
394,000
|
| Death Benefit Only Plan |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Net periodic benefit (income) costs |
(121,000)
|
103,000
|
808,000
|
| Benefit payments |
761,000
|
|
|
| Service cost and accrual adjustments |
$ (216,000)
|
(28,000)
|
(692,000)
|
| Switzerland | Foreign Postretirement Benefit Plan |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Number of plans | plan |
2
|
|
|
| Netherlands | Foreign Postretirement Benefit Plan |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Retirement age | yr |
65
|
|
|
| Europe | Foreign Postretirement Benefit Plan |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Amounts recognized in other comprehensive income (loss) |
$ 1,004,000
|
$ 19,000
|
$ 220,000
|