Equity (Summary of Stock Options Exercised) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Cash proceeds from stock options exercised	$ 1,668	$ 1,305	$ 1,210
Exercise of stock options, income tax benefit	700	100
Intrinsic value of stock options exercised	$ 4,088	$ 1,359	$ 720