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Shareholders' Equity Shareholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Common stock and additional paid-in capital, beginning of period	$ 1,396
Income tax benefit of common stock options exercised	896
Common stock issued pursuant to stock-based compensation plans, net	4,401
Stock-based compensation arrangements	4,783
Common stock and additional paid-in capital, end of period	$ 11,476

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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- Definition

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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