Marketable Securities

6 Months Ended

Dec. 31, 2012

Marketable Securities

Marketable Securities

4.         Marketable Securities

The fair value of the Company’s marketable securities was based on quoted market prices or estimates of fair value as of December 31, 2012 and June 30, 2012. The following is a summary of marketable securities, all of which were classified as available-for-sale as of December 31, 2012 and June 30, 2012:

December 31, 2012			Unrealized		Estimated
($ in millions)	Cost		Losses		Fair Value
Non-current
Municipal auction rate securities	$	6.0	$	(0.9)	$	5.1

June 30, 2012			Unrealized		Estimated
($ in millions)	Cost		Losses		Fair Value
Non-current
Municipal auction rate securities	$	6.0	$	(1.0)	$	5.0

For the six months ended December 31, 2012 and 2011, proceeds from sales and maturities of marketable securities were $0.0 million and $30.4 million, respectively.