Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Unaudited) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]
Dividend declared (in dollars per share)	$ 0.3050	$ 0.8975	$ 1.1325
Deferred compensation plan held Rabbi Trust (shares)	80,024	80,024	70,631
Preferred Stock, Shares Authorized	2,000,000	2,000,000	2,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01
Stock Issued During Period, Shares, New Issues		960,488.00
Stock Issued During Period, Value, Other		$ 62.26
Proceeds from Issuance of Common Stock		$ 57,306,000
Shares issued under the performance incentive plan withheld for employee taxes (shares)		12,031	12,620