Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000816956 (http://www.sec.gov/CIK)

Compensation and Retirement Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Compensation and Retirement Disclosure [Abstract]
Schedule of reconciliation of the projected benefit obligation, plan assets and funded status of the pension plan	The following table provides a reconciliation of the projected benefit obligation, plan assets and funded status of the pension plan at December 31:   2016   2015         Accumulated Benefit Obligation $ 82,005   $ 78,437         Change in benefit obligation       Projected benefit obligation at beginning of year $ 78,437   $ 91,107 Service cost 452   240 Interest cost 2,878   3,394 Actuarial (gain) loss 4,844   (11,806 ) Benefits paid (1,814 )   (1,620 ) Settlement (2,792 )   (2,878 ) Projected benefit obligation at end of year $ 82,005   $ 78,437         Change in plan assets       Fair value of plan assets at beginning of year $ 67,168   $ 73,431 Actual gain (loss) on plan assets 6,499   (1,765 ) Benefits paid (1,814 )   (1,620 ) Settlement (2,792 )   (2,878 ) Fair value of plan assets at end of year $ 69,061   $ 67,168         Funded status $ (12,944 )   $ (11,269 )
Schedule of amounts recognized in the consolidated balance sheets	Amounts recognized in the consolidated balance sheets consist of the following at December 31,:   2016   2015         Other long-term liabilities $ (12,944 )   $ (11,269 ) Accumulated other comprehensive loss (41,960 )   (41,205 )
Schedule of actuarial assumptions used	The following actuarial assumptions were used to determine our net periodic pension benefit cost for the years ended December 31,:   2016   2015   2014             Discount rate on benefit obligation 4.54 %   3.81 %   4.75 % Effective rate for interest on benefit obligation 3.77 %   3.81 %   4.75 % Expected return on plan assets 8.00 %   8.00 %   8.00 % The following actuarial assumptions were used to determine our accumulated and projected benefit obligations as of December 31,:   2016   2015         Discount rate 4.28 %   4.54 %
Schedule of plan assets and benefit obligations recognized in other comprehensive income	Other changes in plan assets and benefit obligations recognized in other comprehensive income in 2016 are as follows:   Current year actuarial loss $ (3,535 ) Amortization of actuarial loss 2,780 Total recognized in other comprehensive loss $ (755 )
Schedule of net benefit cost	Net periodic pension cost for the years ended December 31, consists of the following:   2016   2015   2014             Service cost $ 452   $ 240   $ 271 Interest cost on projected benefit obligation 2,878   3,394   3,465 Expected return on plan assets (5,189 )   (5,697 )   (2,297 ) Amortization of loss 2,780   3,233   (2,048 ) Net periodic pension (income) cost $ 921   $ 1,170   $ (609 )
Schedule of allocation of plan assets	The following table sets forth by level, within the fair value hierarchy, the pension plan's assets at fair value as of December 31, 2016 and December 31, 2015: December 31, 2016 Level 1   Level 2   Total             Common Stock $ 34,856   $ —   $ 34,856 Money Market Fund —   1,710   1,710 Mutual Funds 24,626   —   24,626 Fixed Income Securities 7,869   —   7,869   $ 67,351   $ 1,710   $ 69,061 December 31, 2015 Level 1   Level 2   Total             Common Stock $ 34,466   $ —   $ 34,466 Money Market Fund —   1,302   1,302 Mutual Funds 23,576   —   23,576 Fixed Income Securities 7,824   —   7,824   $ 65,866   $ 1,302   $ 67,168 The allocation of pension plan assets by category is as follows at December 31,:   Percentage of Pension Plan Assets   Target Allocation   2016   2015   2017             Equity securities 86 %   86 %   75 % Debt securities 14   14   25 Total 100 %   100 %   100 %
Schedule of expected benefit payments	The following table summarizes the benefits and settlements expected to be paid by our pension plan in each of the next five years and in aggregate for the following five years. The expected payments are estimated based on the same assumptions used to measure the Company’s projected benefit obligation at December 31, 2016 and reflect the impact of expected future employee service.   2017 $5,033 2018 5,368 2019 5,465 2020 5,696 2021 5,545 2022-2026 25,194