Shareholders' Equity - Preferred Stock, Cash Dividends and Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended		6 Months Ended		21 Months Ended
	Jul. 27, 2016	May 31, 2016	Feb. 29, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jul. 22, 2016	Jan. 06, 2016
Stock line items
Cash dividend paid on common stock (in dollars per share)		$ 0.06	$ 0.06
Cash dividend declared (in dollars per share)				$ 0.06	$ 0.06	$ 0.12	$ 0.11
Shares repurchased and cancelled						226,170		281,598
Cost of shares repurchased and cancelled						$ 1.6		$ 2.0
Price per share of shares repurchased and cancelled						$ 7.23		$ 7.28
Maximum
Stock line items
Repurchase of shares, dollar amount authorized										$ 5.0
Subsequent Event
Stock line items
Cash dividend declared (in dollars per share)	$ 0.06
Subsequent Event | Maximum
Stock line items
Repurchase of shares, dollar amount authorized									$ 5.0