As of December 31, 2018, we had long-term operating leases for office space, automobiles, temporary residences and office equipment. Aggregate operating lease expenses are as follows:

Successor

Predecessor

Period from

Year

August 1, 2017

April 1, 2017

Ended

through

December 31, 2018

December 31, 2017

July 31,

2017

Lease expenses:

Office and other leases

3,840

1,861

1,697

Vessel operating leases

—

1,215

6,166

Total lease expense

3,840

3,076

7,863

Due to our international operations, we are exposed to foreign currency exchange rate fluctuations and exchange rate risks on all charter hire contracts denominated in foreign currencies. For some of our international contracts, a portion of the revenue and local expenses are incurred in local currencies with the result that we are at risk of changes in the exchange rates between the U.S. dollar and foreign currencies. We generally do not hedge against any foreign currency rate fluctuations associated with foreign currency contracts that arise in the normal course of business, which exposes us to the risk of exchange rate losses. To minimize the financial impact of these items, we attempt to contract a significant majority of our services in U.S. dollars. In addition, we attempt to minimize the financial impact of these risks by matching the currency of the company’s operating costs with the currency of the revenue streams when considered appropriate. We continually monitor the currency exchange risks associated with all contracts not denominated in U.S. dollars.

Various legal proceedings and claims are outstanding which arose in the ordinary course of business. In the opinion of management, the amount of ultimate liability, if any, with respect to these actions, will not have a material adverse effect on our financial position, results of operations, or cash flows.