The Spring Grove mill won't be growing.
New environmental regulations are forcing the mill to reduce its consumption of coal. As a consequence, one of the coal-fired power boilers will get shut in the next year or two. (Energy efficiency projects may help to compensate for that, but it's too early to tell.)
Thus, the best-case scenario is keeping production level over the next several years. Otherwise, one or two of the smaller paper machines (PM 5 and/or PM 2) will get shut permanently.
Market conditions are also close to triggering the permanent shutdown of the Specialty Coater.
As far as staffing goes, they terminated 6 salaried folks earlier this year (plus one more in the York office).
If any of the machines cited above actually go down, you can probably count on additional cuts being made to the product development group as well as more cutting of the office folks.
Glatfelter's real competition right now are electronic readers (replacing books) and other electronic communication reducing the demand for stamps and envelopes.