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CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME |  |
Interest expense, amortization of deferred financing costs and debt discounts | $ 1,458 us-gaap_AmortizationOfFinancingCostsAndDiscounts | $ 1,319 us-gaap_AmortizationOfFinancingCostsAndDiscounts

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- Definition Amount of noncash expense included in interest expense to allocate debt discount and premium, and the costs to issue debt and obtain financing over the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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