| | ||||||||
| (Dollars in thousands) | 2017 | 2016 | ||||||
| Cash and cash equivalents | $ | 77,292 | $ | 109,295 | ||||
| Accounts receivable and accrued revenues | 42,212 | 34,461 | ||||||
| Maximum credit exposure | $ | 119,504 | $ | 143,756 | | |||