OTHER ASSETS

Other assets at December 31, 2011 and 2010 consist of the following (in thousands):



	2011		2010
Deferred debt issuance costs	$	10,560	$	9,576
Other	12,930		4,842
Total	$	23,490	$	14,418

Deferred debt issuance costs arose from (i) a $1.0 billion revolving credit facility in October 2011; (ii) the Company’s issuance, in March 2010, of the $575.0 million aggregate principal amount of 1.25% Convertible Senior Notes due 2015 (the "2015 Notes"); (iii) the Company’s issuance, in September 2006, of $172.5 million aggregate principal amount of 2013 Notes; and (iv) a $175.0 million revolving credit facility in September 2007. Deferred debt issuance costs are being amortized using the effective interest rate method over the term of approximately five years, except for the 2013 Notes, which were amortized over their term of seven years. The period of amortization for the Company’s debt issue costs was determined at inception of the related debt agreements to be the stated maturity date. Unamortized debt issuance costs written off to interest expense in the year ended December 31, 2010 related to early conversion of convertible debt amounted to $1.4 million. Unamortized debt issuance costs written off in the year ended December 31, 2011 for debt conversions were insignificant.