pre_text: 18. Commitments The Group leases various offices in locations such as Amsterdam, the Netherlands; the San Francisco Bay Area, California, New York, New York, Austin, Texas, and Boston, Massachusetts, United States; Sydney, Australia; Manila, the Philippines; Bengaluru, India; Yokohama, Japan; and Ankara, Turkey under non-cancellable operating leases expiring within one to nine years. The leases have varying terms, escalation clauses and renewal rights. On renewal, the terms of the leases are renegotiated. The Group incurred rent expense on its operating leases of $38.6 million, $23.6 million, and $12.2 million during the fiscal years ended 2019, 2018 and 2017, respectively. Additionally, the Group has a contractual commitment for services with third-parties related to its cloud services platform and data centers. These commitments are non-cancellable and expire within two to four years. Commitments for minimum lease payments in relation to non-cancellable operating leases and purchase obligations as of June 30, 2019 were as follows:
table: Operating Leases Other Contractual Commitments Total
table: (U.S. $ in thousands)
table: Fiscal Period:
table: Year ending 2020 $38,790 $108,978 $147,768
table: Years ending 2021 - 2024 148,021 219,342 367,363
table: Thereafter 144,037 — 144,037
table: Total commitments $330,848 $328,320 659,168
question: Analyse this data from a financial earnings document. What is the difference in the total commitments between that of operating leases and other contractual commitments?