Subsequent Events (Details) - USD ($)		1 Months Ended	12 Months Ended
	Feb. 08, 2017	Jan. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Cash dividends declared (in USD per share)			$ 0.60	$ 0.57	$ 0.46
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividends declared (in USD per share)	$ 0.15
Dividend declaration date	Feb. 09, 2017
Dividend payable date	Apr. 04, 2017
Dividend record date	Mar. 17, 2017
Subsequent Event [Member] | Interest Rate Swap [Member]
Subsequent Event [Line Items]
Derivative Entered into		Jan. 31, 2017
Maturity date		Jan. 31, 2020
Subsequent Event [Member] | 2015 Credit Agreement [Member] | Interest Rate Swap [Member]
Subsequent Event [Line Items]
Notional Amount		$ 50,000,000
Fixed Rate		1.625%