Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in $ per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	9,119,058	9,613,088
Common stock, shares outstanding (in shares)	5,889,013	8,398,944
Treasury stock, shares (in shares)	3,230,045	1,214,144