Cash Equivalents	6 Months Ended
Cash Equivalents	Jun. 30, 2013
Cash Equivalents [Abstract]
Cash Equivalents [Text Block]	(4) Cash Equivalents At June 30, 2013 and December 31, 2012, the company had invested approximately $196 million and $215 million, respectively, in cash equivalents in the form of money market funds with three financial institutions. The company considers these money market funds to be Level 1 financial instruments.

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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