Equity Incentive Awards (Tables)

12 Months Ended

Dec. 31, 2017

Equity Incentive Awards [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

	2017				2016				2015
(in thousands, except exercise price data)	Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price
Outstanding at beginning of year	4,834		$	11.24	4,217		$	12.35	3,371		$	14.98
Granted	892		14.31		1,370		10.40		1,207		6.83
Exercised	(458	)	11.97		(495	)	12.17		(19	)	11.14
Expired	(157	)	26.42		(195	)	27.33		(187	)	27.29
Forfeited	(150	)	13.84		(63	)	10.45		(155	)	8.51
Outstanding at end of year	4,961		11.17		4,834		11.24		4,217		12.35
Exercisable at end of year	3,077		$	10.95	2,727		$	12.55	2,686		$	14.53

Schedule of Nonvested Restricted Stock Units Activity

	Shares		Weighted Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2016	875		$	8.13
Granted	418		14.44
Vested	(286	)	8.78
Forfeited	(61	)	11.57
Outstanding at December 31, 2017	946		$	10.50