Shareholders' Equity (Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stockholders' Equity Note [Abstract]
Stock-based compensation expense	$ 3,859	$ 2,872	$ 7,609	$ 5,695
Less: Deferred tax benefit	(1,352)	(939)	(2,659)	(1,950)
Stock-based compensation expense, net of tax	$ 2,507	$ 1,933	$ 4,950	$ 3,745