Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Dividends declared per share	$ 0.220	$ 0.200	$ 0.200
Purchase of common stock, shares	225,000	1,200,000	821,091
Equity compensation activity, shares	185,382	524,488	288,413