Fair-Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Summary Of Valuation Of Financial Instruments At Fair-Value



	June 30, 2012
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	424,049	$	84,076	$	339,973	$	—
Current marketable securities	5,000		—		5,000		—
Other marketable securities	5,185		—		—		5,185



	December 31, 2011
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	398,450	$	84,872	$	313,578	$	—
Current marketable securities	13,255		—		13,255		—
Other marketable securities	5,354		—		—		5,354

Changes In Fair Values Of Auction-Rate Security



(Dollars in thousands)	Auction-rate security
Balance at December 31, 2010	$	6,039
Unrealized loss	(10		)
Partial redemption	(675		)
Balance at December 31, 2011	$	5,354
Unrealized loss	(94		)
Partial redemption	(75		)
Balance at June 30, 2012	$	5,185

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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