Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized in the table below. As of December 31, 2012 and 2013, we did not hold any financial instruments categorized as Level 2 or Level 3. Our Level 1 assets and liabilities are valued using quoted market prices.  

(In thousands)	December 31, 2012		December 31, 2013
Level 1:
Assets:
Money market funds (1)	$	160,790	$	102,380
Rabbi trust (2)	520		835
Total	$	161,310	$	103,215
Liabilities:
Deferred compensation (3)	$	410	$	540
Total	$	410	$	540

(1) Money market funds are classified in cash and cash equivalents.

(2) Investments in marketable securities held in a Rabbi Trust associated with a non-qualified deferred compensation plan are classified in other non-current assets.

(3) Obligations to pay benefits under a non-qualified deferred compensation plan are classified in other non-current liabilities.