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Earnings Per Common Share (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Stock options and restricted stock units excluded from the earnings per common share	3,057	288	553
Subordinated Convertible Notes Due 2029 [Member]
Debt Instrument [Line Items]
Weighted average conversion price per share	36.75

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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