The following table summarizes our cash and investments in cash equivalents and marketable securities held by investment managers and overnight investments:



	June 30, 2013			December 31, 2012
	(in thousands)
Overnight Holdings
Money market funds (cash equivalents)	$	135,260		$	255,000
Investment Holdings
Money market funds (cash equivalents)	37,233			26,087
Marketable securities	52,686			16,904
	225,179			297,991
Cash held in demand accounts	18,313			21,732
Outstanding checks	(12,313		)	(38,275		)
Total cash, cash equivalents and marketable securities	$	231,179		$	281,448

Cash and cash equivalents	$	178,493		$	264,544
Marketable securities	52,686			16,904
	$	231,179		$	281,448

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

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Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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