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Leases | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Leases of Lessee Disclosure | Leases The Company leases certain equipment and facilities under non-cancelable operating leases. Rental expense for the Company totaled approximately $16.7 million in 2017, $17.4 million in 2016 and $17.2 million in 2015. Minimum payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year at December 31, 2017 are summarized below (dollars in thousands):
Year ended December 31, |  | Minimum Payments
2018 |  | $ | 13,960 |
2019 |  | 12,870 |
2020 |  | 12,010 |
2021 |  | 10,830 |
2022 |  | 7,430 |
Thereafter |  | 19,850 |
Total |  | $ | 76,950 |

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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