on either a straight-line or accelerated basis .amortization expense for intangibles was approximately $ 4.2 million , $ 4.1 million and $ 4.1 million during the years ended december 31 , 2010 , 2009 and 2008 , respectively .estimated annual amortization expense of the december 31 , 2010 balance for the years ended december 31 , 2011 through 2015 is approximately $ 4.8 million .impairment of long-lived assets long-lived assets are reviewed for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable .if such review indicates that the carrying amount of long- lived assets is not recoverable , the carrying amount of such assets is reduced to fair value .during the year ended december 31 , 2010 , we recognized impairment charges on certain long-lived assets during the normal course of business of $ 1.3 million .there were no adjustments to the carrying value of long-lived assets of continuing operations during the years ended december 31 , 2009 or 2008 .fair value of financial instruments our debt is reflected on the balance sheet at cost .based on market conditions as of december 31 , 2010 , the fair value of our term loans ( see note 5 , 201clong-term obligations 201d ) reasonably approximated the carrying value of $ 590 million .at december 31 , 2009 , the fair value of our term loans at $ 570 million was below the carrying value of $ 596 million because our interest rate margins were below the rate available in the market .we estimated the fair value of our term loans by calculating the upfront cash payment a market participant would require to assume our obligations .the upfront cash payment , excluding any issuance costs , is the amount that a market participant would be able to lend at december 31 , 2010 and 2009 to an entity with a credit rating similar to ours and achieve sufficient cash inflows to cover the scheduled cash outflows under our term loans .the carrying amounts of our cash and equivalents , net trade receivables and accounts payable approximate fair value .we apply the market and income approaches to value our financial assets and liabilities , which include the cash surrender value of life insurance , deferred compensation liabilities and interest rate swaps .required fair value disclosures are included in note 7 , 201cfair value measurements . 201d product warranties some of our salvage mechanical products are sold with a standard six-month warranty against defects .additionally , some of our remanufactured engines are sold with a standard three-year warranty against defects .we record the estimated warranty costs at the time of sale using historical warranty claim information to project future warranty claims activity and related expenses .the changes in the warranty reserve are as follows ( in thousands ) : .
[['balance as of january 1 2009', '$ 540'], ['warranty expense', '5033'], ['warranty claims', '-4969 ( 4969 )'], ['balance as of december 31 2009', '604'], ['warranty expense', '9351'], ['warranty claims', '-8882 ( 8882 )'], ['business acquisitions', '990'], ['balance as of december 31 2010', '$ 2063']]
self-insurance reserves we self-insure a portion of employee medical benefits under the terms of our employee health insurance program .we purchase certain stop-loss insurance to limit our liability exposure .we also self-insure a portion of .

Question: what was the change in warranty reserve between 2009 and 2010?
Answer: 1459