December 31, | |||||||
(in thousands) | 2016 | 2015 | |||||
Land | $ | 30,672 | $ | 29,928 | |||
Land improvements and leasehold improvements | 79,631 | 77,191 | |||||
Buildings and storage facilities | 322,856 | 303,482 | |||||
Machinery and equipment | 392,418 | 375,028 | |||||
Construction in progress | 12,784 | 32,871 | |||||
838,361 | 818,500 | ||||||
Less: accumulated depreciation | 388,309 | 363,240 | |||||
$ | 450,052 | $ | 455,260 | ||||