Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Deferred compensation plan held Rabbi Trust (in shares)	70,253	70,253	57,382
Shares issued under the performance incentive plan withheld for employee taxes (in shares)		12,620	12,687
Cash Dividends Declared Per Share of Common Stock (in usd per share)	$ 0.2875	$ 0.845	$ 1.0667