Shareholders' Equity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Stockholders' Equity Note [Abstract]
Common stock and additional paid-in capital, beginning of period	$ 1,396
Income tax benefit of common stock options exercised	3,487
Common stock issued pursuant to stock-based compensation plans, net	13,475
Stock-based compensation arrangements	19,362
Repurchase of common stock	(36,339)
Common stock and additional paid-in capital, end of period	$ 1,381