Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Summary of Dilutive Effect for Awards with Exercise Price Less Than Average Stock Price

Weighted average shares were as follows (in thousands):

	Three months ended June 30,		Six months ended June 30,
	2014	2013	2014	2013
Weighted average common shares outstanding, basic	41,570	41,050	41,866	40,981
Dilutive potential common shares	1,514	1,674	1,937	1,676
Weighted average common shares outstanding, diluted	43,084	42,724	43,803	42,657
Shares excluded	906	1,122	823	1,043