Available-for-Sale-Securities (Tables)

9 Months Ended

Sep. 30, 2014

Available-for-sale Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The following table is a summary of available-for-sale securities recorded in cash and cash equivalents or marketable securities in our Consolidated Balance Sheets (in thousands):

	September 30, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Money market funds	$	17,512.9	$	—	$	—	$	17,512.9
Municipal debt securities	970.0		0.1		—		970.1
Total	$	18,482.9	$	0.1	$	—	$	18,483.0

Marketable Securities [Table Text Block]

Estimated fair values of available-for-sale securities are generally based on prices obtained from commercial pricing services. The following table summarizes the classification of the available-for-sale debt securities on our Consolidated Balance Sheets (in thousands):

	September 30, 2014
Cash and cash equivalents	$	17,817.9
Marketable securities	665.1
Total	$	18,483.0

Investments Classified by Contractual Maturity Date [Table Text Block]

The following table summarizes our portfolio of available-for-sale debt securities by contractual maturity (in thousands):

	September 30, 2014
	Amortized Cost		Estimated Fair Value
Less than one year	$	18,482.9	$	18,483.0
Greater than one year	—		—
Total	$	18,482.9	$	18,483.0