Dividends and Share Repurchases (Details) - $ / shares			3 Months Ended
	Jan. 18, 2017	Nov. 18, 2016	Dec. 31, 2016	Dec. 31, 2015
Dividends Payable [Line Items]
Cash dividends per share (in dollars per share)		$ 0.14	$ 0.14	$ 0.13
Stock repurchased (in shares)			757,768
Average cost per share (in dollars per share)			$ 26.90
Warrants outstanding (in shares)			689,498
Remaining shares authorized to be repurchased (in shares)			4,231,553
Subsequent Event
Dividends Payable [Line Items]
Dividends declared (in dollars per share)	$ 0.15
Special dividends declared (in dollars per share)	$ 0.25
2008 Troubled Asset Relief Program
Dividends Payable [Line Items]
Stock issued during period (in shares)			49,989