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

Reporting Entity [Axis]

0000706688 (http://www.sec.gov/CIK)

Debt Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Debt Disclosure [Abstract]
Summary of Company's Credit Facilities	Following is a summary of the Company’s debt, net of unamortized debt issuance costs:   December 31, (In Thousands) 1 2016   2015 DAMI Credit Facility $ 47,302   $ 41,409 Revolving Facility —   73,232 Senior Unsecured Notes, 3.95%, Due in Installments through April 2018 49,975   74,956 Term Loan, Due in Installments through December 2019 94,626   108,393 Senior Unsecured Notes, 4.75%, Due in Installments through April 2021 299,562   299,462       Capital Lease Obligation:       with Related Parties 3,095   4,703 with Unrelated Parties 3,269   4,591 Total Debt 497,829   606,746 Less: Current Maturities 146,515   156,235 Long-Term Debt $ 351,314   $ 450,511 1 Total debt as of December 31, 2016 includes unamortized debt issuance costs of $2.9 million. The Company retrospectively adopted ASU 2015-03 in the first quarter of 2016, which resulted in the reclassification of unamortized debt issuance costs of $3.7 million from prepaid and other expenses to a direct reduction from debt in the consolidated balance sheet as of December 31, 2015.
Future Maturities of Long Term Debt and Capital Lease Obligations	Future principal maturities under the Company’s debt and capital lease obligations are as follows: (In Thousands)   2017 $ 147,637 2018 98,851 2019 133,190 2020 60,755 2021 60,337 Thereafter — Total $ 500,770