XML 79 R68.htm IDEA: XBRL DOCUMENT

Available-for-Sale Securities Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2012

Dec. 31, 2011

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

$ 45,992

$ 139,006

Mutual funds

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

2,023

^[1]

1,923

^[1]

Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

29,737

^[2]

123,210

^[2]

Asset-backed securities and collateralized mortgage obligations

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

8,477

^[3],[4]

8,131

^[3],[5]

Corporate notes and bonds

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

5,755

5,742

Level 2

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

39,649

132,976

Level 2 | Mutual funds

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

2,023

1,923

Level 2 | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

29,737

123,210

Level 2 | Asset-backed securities and collateralized mortgage obligations

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

2,134

2,101

Level 2 | Corporate notes and bonds

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

5,755

5,742

Level 3

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

6,343

6,030

Level 3 | Asset-backed securities and collateralized mortgage obligations

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale securities

$ 6,343

$ 6,030

[1]	Various U.S. equities and other investments managed under mutual funds.
[2]	Commercial paper with maturities less than one year.
[3]	Asset-backed and mortgage-backed securities with maturities of up to 26 years.
[4]	Included in our asset-backed securities and collateralized mortgage obligations is approximately $6.3 million of commercial paper secured by mortgaged-backed securities.
[5]	Included in our asset-backed securities and collateralized mortgage obligations is approximately $7.4 million of commercial paper secured by mortgaged-backed securities.

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details