Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

A summary of financial assets and liabilities that are measured at fair value on a recurring basis, as of June 30, 2015 and December 31, 2014 were as follows (in thousands):



	Quoted Prices in Active Markets		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
June 30, 2015
Assets:
Investments available-for-sale:
Marketable securities - deferred
compensation plan	$	—	$	45,530	$	—	$	45,530
Marketable securities - other	2,789		—		—		2,789
Liabilities:
Marketable securities - deferred
compensation plan	—		45,012		—		45,012
Contingent consideration	—		—		1,539		1,539



December 31, 2014
Assets:
Investments available-for-sale:
Marketable securities - deferred
compensation plan	$	—	$	45,126	$	—	$	45,126
Marketable securities - other	2,257		—		—		2,257
Liabilities:
Marketable securities - deferred
compensation plan	—		42,968		—		42,968

Assumptions used in the Monte Carlo simulation

We used the following assumptions in the Monte Carlo simulation lattice option-pricing model:



	June 30, 2015
Assumptions:
Rig count volatility	1.74	%
Cost of debt	5.18	%
Date of first contingent consideration payment	December 31, 2016
Date of second contingent consideration payment	June 30, 2017

Schedule of contingent consideration

The following table sets forth a reconciliation of the changes in the fair value of the contingent consideration payable as classified as Level 3 in the fair value hierarchy (in thousands):



	Significant
	Unobservable
Beginning Balance, December 31, 2014	$	—
Contingent consideration	1,539
Ending Balance, June 30, 2015	$	1,539