Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Cash and Cash Equivalents

The Company’s cash and cash equivalent balances comprise the following:

	September 30, 2017			December 31, 2016
(in thousands, except percentages)	Amount		% of Total	Amount		% of Total
Cash accounts	$	528,134	57.4	$	488,504	59.4
Money market funds	391,437		42.6	333,975		40.6
Total	$	919,571		$	822,479