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Earnings Per Common Share (EPS) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic and Diluted [Abstract]
Net Income, Basic EPS									$ 22,974us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 16,570us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 19,710us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Shares, Basic EPS									43,143us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	42,607us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	42,176us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic (in dollars per share)	$ 0.20us-gaap_EarningsPerShareBasic	$ 0.18us-gaap_EarningsPerShareBasic	$ 0.09us-gaap_EarningsPerShareBasic	$ 0.07us-gaap_EarningsPerShareBasic	$ 0.15us-gaap_EarningsPerShareBasic	$ 0.13us-gaap_EarningsPerShareBasic	$ 0.09us-gaap_EarningsPerShareBasic	$ 0.02us-gaap_EarningsPerShareBasic	$ 0.53us-gaap_EarningsPerShareBasic	$ 0.39us-gaap_EarningsPerShareBasic	$ 0.47us-gaap_EarningsPerShareBasic
Effect of dilutive stock options and warrants									266us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	277us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	434us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Net Income, Diluted EPS									$ 22,974us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted	$ 16,570us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted	$ 19,710us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Shares, Diluted EPS									43,409us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	42,884us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	42,610us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted (in dollars per share)	$ 0.20us-gaap_EarningsPerShareDiluted	$ 0.18us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ 0.07us-gaap_EarningsPerShareDiluted	$ 0.15us-gaap_EarningsPerShareDiluted	$ 0.13us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ 0.02us-gaap_EarningsPerShareDiluted	$ 0.53us-gaap_EarningsPerShareDiluted	$ 0.39us-gaap_EarningsPerShareDiluted	$ 0.46us-gaap_EarningsPerShareDiluted
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									1,292us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1,823us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1,588us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

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- Definition

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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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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