Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Long-term Debt and Capital Lease Obligations [Abstract]

Schedule of Long-Term Debt

Long-term debt, principally to banks and noteholders, consists of:

(in thousands, except interest rates)	2018		2017
Revolving credit agreement with borrowings outstanding at an end of period interest rate of 3.69% in 2018 and 3.40% in 2017 (including the effect of interest rate hedging transactions, as described below), due in 2022	$499,000		$501,000
Finance obligation	25,931		14,919
Long-term debt	524,931		515,919
Less: current portion	(1,224	)	(1,799	)
Long-term debt, net of current portion	$523,707		$514,120

Schedule of Future Minimum Annual Finance Obilgations

The following schedule presents future minimum annual payments under the finance obligation and the present value of the minimum payments, as of December 31, 2018.

Years ending December 31,	(in thousands)
2019	$ 2,472
2020	2,995
2021	2,997
2022	3,054
2023	3,277
Thereafter	18,930
Total minimum payments	33,725
Less: Amount representing interest	(7,794	)
Present value of minimum payments	$ 25,931