INVENTORY AND LONG-TERM PARTS INVENTORY

The following summarizes our inventory, recorded at the lower of weighted average cost or estimated net realizable value, as of March 31, 2017, and December 31, 2016 (in thousands):



	March 31, 2017		December 31, 2016
Finished goods product inventory	$	52,396	$	52,571
In-process mineral inventory	16,377		22,126
Total product inventory	68,773		74,697
Current parts inventory, net	17,421		19,658
Total current inventory, net	86,194		94,355
Long-term parts inventory, net	23,731		21,037
Total inventory, net	$	109,925	$	115,392

Parts inventories are shown net of any required allowances. At March 31, 2017, and December 31, 2016, allowances for parts inventory obsolescence were $2.5 million and $3.1 million, respectively.

During the three months ended March 31, 2017, and 2016, we recorded charges of approximately $3.8 million and $9.0 million, respectively, as a result of routine assessments of the lower of weighted average cost or estimated net realizable value of our finished goods product inventory.

During the beginning of 2016 before the conversion of the East facility to Trio^®-only, we suspended potash production at our East facility for a total of seven days as we performed a testing run and converted the East facility to a Trio^®-only facility. As a result of the suspension of production, we determined that approximately $0.7 million of production costs at our East facility would have been allocated to additional tons produced, assuming we had been operating at normal production rates for the first quarter of March 31, 2016. Accordingly, these costs were excluded from our inventory values and instead expensed in 2016 as period production costs.