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Selected Unaudited Quarterly Information (Details) (USD $) In Thousands, except 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
Selected Unaudited Quarterly Information
Revenues	$ 62,489us-gaap_Revenues	$ 61,190us-gaap_Revenues	$ 62,741us-gaap_Revenues	$ 63,263us-gaap_Revenues	$ 63,024us-gaap_Revenues	$ 58,446us-gaap_Revenues	$ 47,671us-gaap_Revenues	$ 44,495us-gaap_Revenues	$ 249,683us-gaap_Revenues	$ 213,636us-gaap_Revenues	$ 161,580us-gaap_Revenues
Income from continuing operations	4,295us-gaap_IncomeLossFromContinuingOperations	1,567us-gaap_IncomeLossFromContinuingOperations	3,713us-gaap_IncomeLossFromContinuingOperations	3,573us-gaap_IncomeLossFromContinuingOperations	4,352us-gaap_IncomeLossFromContinuingOperations	3,996us-gaap_IncomeLossFromContinuingOperations	4,643us-gaap_IncomeLossFromContinuingOperations	4,303us-gaap_IncomeLossFromContinuingOperations	13,148us-gaap_IncomeLossFromContinuingOperations	17,294us-gaap_IncomeLossFromContinuingOperations	22,950us-gaap_IncomeLossFromContinuingOperations
Income from discontinued operations					2,239us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	98us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	98us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	98us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity		2,533us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	(15,317)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income	$ 4,295us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 1,567us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 3,713us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 3,573us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 6,591us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 4,094us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 4,741us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 4,401us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 13,148us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 19,827us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 7,633us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Basic and diluted net income per share (in dollars per share)	$ 0.04us-gaap_EarningsPerShareBasicAndDiluted	$ 0.02us-gaap_EarningsPerShareBasicAndDiluted	$ 0.04us-gaap_EarningsPerShareBasicAndDiluted	$ 0.04us-gaap_EarningsPerShareBasicAndDiluted	$ 0.07us-gaap_EarningsPerShareBasicAndDiluted	$ 0.04us-gaap_EarningsPerShareBasicAndDiluted	$ 0.05us-gaap_EarningsPerShareBasicAndDiluted	$ 0.05us-gaap_EarningsPerShareBasicAndDiluted	$ 0.13us-gaap_EarningsPerShareBasicAndDiluted	$ 0.21us-gaap_EarningsPerShareBasicAndDiluted	$ 0.09us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of shares outstanding, basic and diluted (in shares)	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	91,847,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82,937,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100,187,405us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	93,855,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82,937,000us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted

X

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or 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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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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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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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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