Stock Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes RSU information for the three years ended December 31, 2019:

	2019		2018		2017
RSUs granted and unvested at beginning of period:	5,062,661		5,216,972		7,293,147
Granted	840,796		1,140,048		1,283,976
Vested	(1,447,522	)	(900,254	)	(2,990,261	)
Canceled	(331,675	)	(394,105	)	(369,890	)
RSUs granted and unvested at end of period:	4,124,260		5,062,661		5,216,972

Schedule of Share-based Compensation, Unearned Compensation Related to RSU's

The fair value of RSUs at the date of grant are recorded as unearned compensation, a component of stockholders’ equity, and expensed over the vesting period. Following is a summary of changes in unearned compensation for the three years ended December 31, 2019:

(In thousands)	2019			2018			2017
Unearned compensation at beginning of year	$	129,669		$	122,910		$	115,965
RSUs granted, net of cancellations	53,583			52,204			52,897
RSUs expensed	(47,329		)	(34,408		)	(38,796		)
RSUs forfeitures	(7,533		)	(11,037		)	(7,156		)
Unearned compensation at end of year	$	128,390		$	129,669		$	122,910