Business Combinations (Pro Forma Impact Of Business Combination) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Business Combinations [Abstract]
Revenues, Pro Forma	$ 498,331	[1]	$ 468,656	[1]
Net income, Pro Forma	244,918	[1]	152,016	[1]
Net income attributable to common shareholders, Pro Forma	$ 163,907	[1]	$ 108,805	[1]
Earnings per share - basic, Pro Forma	$ 1.35	[1]	$ 0.90	[1]
Earnings per share - diluted, Pro Forma	$ 1.34	[1]	$ 0.89	[1]

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