Stockholders' Equity Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic	52,617,245	52,512,474	52,075,388	51,658,823
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,784,106	2,107,319	1,725,448	2,081,328
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	143,412	0	143,412	0
Weighted Average Number of Shares Outstanding, Diluted	54,544,763	54,619,793	53,944,248	53,740,151