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Stock Based Compensation Plans	6 Months Ended
Stock Based Compensation Plans	Jun. 30, 2015
Stock Based Compensation Plans [Abstract]
Stock Based Compensation Plans	(5)Stock-Based Compensation Plans The Company maintains various stock incentive plans that provide long-term incentives to the Company’s key employees, including officers, directors, consultants and advisors (Eligible Participants). Under the stock incentive plans, the Company may grant incentive stock options, non-qualified stock options, restricted stock, restricted stock units, stock appreciation rights, other stock-based awards or any combination thereof to Eligible Participants. The Company’s total compensation expense related to these plans was approximately $24.5 million and $22.6 million for the six months ended June 30, 2015 and 2014, respectively, which is reflected in general and administrative expenses.