Nature of Business Operations - Narrative (Details) a in Millions	12 Months Ended
	Dec. 31, 2016 a segment $ / shares	Sep. 30, 2016 a
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Common stock, par value (dollars per share) | $ / shares	$ 0
Acres of timberland owned or leased	2.7	0.4
Acres of high value real estate owned	0.2
Number of reportable segments | segment	5