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Fair Value of Financial Instruments
9 Months Ended
Sep. 30, 2011
Notes to Financial Statements [Abstract] 
Fair Value of Financial Instruments
11.  
Fair Value of Financial Instruments

Roper's long-term debt at September 30, 2011 included $500 million of fixed-rate senior notes due 2019, with a fair value of $605 million, and $500 million of fixed-rate senior notes due 2013, with a fair value of $549 million, based on the trading prices of the notes.  Short-term debt included $68 million of fixed-rate convertible notes that were reported at fair value due to the ability of note holders to exercise the conversion option of the notes.

The Company manages interest rate risk by maintaining a combination of fixed- and variable-rate debt, which may include interest rate swaps to convert fixed-rate debt to variable-rate debt, or to convert variable-rate debt to fixed-rate debt.   At September 30, 2011 an aggregate notional amount of $500 million in interest rate swaps designated as fair value hedges effectively changed the Company's $500 million senior notes due 2013 with a fixed interest rate of 6.625% to a variable rate obligation at a weighted average spread of 4.377% plus the 3 month London Interbank Offered Rate ("LIBOR").

The swaps are recorded at fair value in the balance sheet as an asset or liability, and the changes in fair value of both the interest rate swap and the hedged senior notes due 2013 are recorded as interest expense. At September 30, 2011, the fair value of the swap was an asset balance of $14.84 million and was reported in other assets, with a corresponding increase of $14.81 million in the notes being hedged, which was reported as long-term debt.  The impact on earnings for the three and nine month periods ended September 30, 2011 was immaterial. The Company has determined the swaps to be Level 2 in the FASB fair value hierarchy, and uses inputs other than quoted prices that are observable for the asset or liability, including interest rates, yield curves and credit risks in order to value the instruments.

In the third quarter of 2011, the Company entered into foreign currency forward contracts expiring in the fourth quarter of 2011 to offset the foreign currency remeasurement gains and losses related to intercompany notes structured as non-permanent advances.  At September 30, 2011, the fair value of the forward contracts was an asset balance of $3.4 million and was reported in other receivables. The Company has determined the swaps to be Level 2 in the FASB fair value hierarchy, and uses foreign currency exchange rates that are observable for the asset in order to value the instruments.