Business Combinations (Pro Forma Impact Of Business Combination and Acquisitions) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Business Acquisition [Line Items]
Revenues, Pro Forma	$ 506,861	[1]	$ 474,383	[1]	$ 460,472	[1]
Net income, Pro Forma	244,918	[1]	152,016	[1]	37,664	[1]
Net income attributable to common shareholders, Pro Forma	$ 163,907	[1]	$ 108,805	[1]	$ 1,070	[1]
Earnings per share - basic, Pro Forma	$ 1.35	[1]	$ 0.90	[1]	$ 0.01	[1]
Earnings per share - diluted, Pro Forma	$ 1.34	[1]	$ 0.89	[1]	$ 0.01	[1]

[1] There are no non-recurring pro forma adjustments included within or excluded from the amounts in the preceding table.