Net Earnings Per Common Share Net Earnings Per Common Share Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Preferred stock redemption	$ 0	$ 0	$ (9,759)	$ 0	$ (9,759)	$ 0	$ 0