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Note 11 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measurement at September 30, 2014
						Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs				Significant Unobservable Inputs
		Total				Level 1				Level 2				Level 3
Assets:
Money market funds		$	29,103			$	29,103			$	-			$	-
U.S. treasuries and government agency bonds			126,849				-				126,849				-
Auction-rate securities backed by student-loan notes			9,795				-				-				9,795
Total		$	165,747			$	29,103			$	126,849			$	9,795

Liabilities:
Contingent consideration		$	2,507			$	-			$	-			$	2,507
Total		$	2,507			$	-			$	-			$	2,507

		Fair Value Measurement at December 31, 2013
						Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs				Significant Unobservable Inputs
		Total				Level 1				Level 2				Level 3
Assets:
Money market funds		$	35,588			$	35,588			$	-			$	-
U.S. treasuries and government agency bonds			128,126				-				128,126				-
Auction-rate securities backed by student-loan notes			9,860				-				-				9,860
Total		$	173,574			$	35,588			$	128,126			$	9,860

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Balance at January 1, 2014		$	9,860
Change in unrealized loss included in other comprehensive income			(65	)
Ending balance at September 30, 2014		$	9,795

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

		September 30,				December 31,
		2014				2013
Time-to-liquidity (months)			24				24
Expected return			2.9%				2.5%
Discount rate			4.1% - 7.1%				3.3% - 8.1%

Schedule of Net Benefit Costs [Table Text Block]

		September 30,
(in millions)		2014
Project revenue in 2016			$2.1 - $3.8
Discount rate			9.0%
Probability of occurrence			20% - 50%

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 (loss), 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, issues, 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.

+ References+ Details

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References+ Details