Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Undistributed earnings included in retained earnings	$ 10,827
Capitalized interest	25,932	7,706	693
Goodwill	62,016	29,990
Amortization period, minimum (in years)	3 years
Amortization period, maximum (in years)	6 years
Other assets amortization period, minimum (in years)	1 year
Other assets amortization period, maximum (in years)	20 years
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 5,449	$ 11,967	$ 3,361