Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Basic EPS
Net income	$ 1,615	$ 1,845	$ 23,991
Weighted-average common shares outstanding used in earnings per share computations	61,872	62,686
Basic earnings per common share (in dollars per share)	$ 0.03us-gaap_EarningsPerShareBasic	$ 0.03us-gaap_EarningsPerShareBasic
Diluted EPS
Net income	$ 1,615	$ 1,845	$ 23,991
Shares used in diluted earnings per share computations	62,201	62,971
Diluted earnings per common share (in dollars per share)	$ 0.03us-gaap_EarningsPerShareDiluted	$ 0.03us-gaap_EarningsPerShareDiluted
Computation of Shares Used in Earnings Per Share Computations
Weighted-average common shares outstanding	61,872	62,686
Weighted-average common equivalent shares - dilutive effect of stock options and awards	329	285
Shares used in diluted earnings per share computations	62,201	62,971

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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