Basis of Presentation and Summary of Significant Accounting Policies (Details 4) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Denominator for EPS calculation:
Weighted-average common shares, basic	54,372	52,791	53,962	52,328
Effect of dilutive securities:
Stock options (in shares)	0	3,064	0	3,050
Weighted-average common shares, diluted (in shares)	54,372	55,855	53,962	55,378