The present invention provides crystalline hydrates of the oxalate and succinate salts of 5-ethyl-2-fluoro-4-(3-(5-(1-methylpiperidin-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridin-2-yl)-1H-indazol-6-yl)phenol. The invention also provides pharmaceutical compositions comprising such crystalline hydrates, methods of using such crystalline hydrates to treat respiratory and other diseases, and processes useful for preparing such crystalline oxalate and succinate hydrates.