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Leases | 12 Months Ended
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Dec. 31, 2018
Leases [Abstract] |
Leases | Leases The Company enters into noncancelable operating lease agreements for equipment, buildings and vehicles. The minimum lease payments for the noncancelable operating lease agreements are as follows (in thousands):
2019 |  | $ | 19,678 |
2020 |  | 16,658 |
2021 |  | 14,823 |
2022 |  | 11,733 |
2023 |  | 11,017 |
Thereafter |  | 24,374 |
Rent expense for noncancelable operating leases approximated $22.4 million, $18.4 million and $15.1 million for the years ended December 31, 2018, 2017 and 2016, respectively. The leases are generally renewable at the Company’s option for periods of one to five years.

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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