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Operating Leases | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Operating Leases | Operating Leases The Company leases certain property and equipment under cancelable and non-cancelable agreements including office space. Minimum annual rentals for all operating leases having initial non-cancelable lease terms in excess of one year are as follows (amounts in thousands):
Years Ending December 31, | Amount
2018 | $ | 4,086 |
2019 | 2,987 |
2020 | 2,303 |
2021 | 1,484 |
2022 | 441 |
Thereafter | — |
Total future minimum rental payments | $ | 11,301 |
Total expense for operating leases amounted to approximately $5.0 million, $4.7 million and $1.5 million during 2017, 2016 and 2015, respectively.

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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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