Equity-based Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2017

Equity-based Incentive Plans [Abstract]

Schedule of Restricted Stock Units Award Activity

A summary of the company’s RSU activity and outstanding RSUs as of December 31, 2017, are presented below (dollars in thousands except grant date fair value):

		Weighted		Aggregate
	Number	Average Grant		Intrinsic		Unrecognized
	of RSUs	Date Fair Value		Value		Compensation
Outstanding RSUs as of January 1, 2015	2,011,226		$19.85	$	39,702	$	25,171
Granted	1,589,309		$16.70
Vested	(1,197,403)		$18.13
Forfeited	(124,428)		$19.89
As of December 31, 2015	2,278,704		$18.55	$	40,720	$	27,615
Granted	852,063		$32.40
Vested	(962,828)		$22.76
Forfeited	(139,922)		$18.50
As of December 31, 2016	2,028,017		$22.38	$	72,157	$	29,086
Granted	828,955		$36.29
Vested	(1,364,593)		$18.50
Forfeited	(78,737)		$23.52
As of December 31, 2017 (nonvested)	1,413,642		$34.22	$	60,970	$	32,017

Schedule of Stock Options Activity

A summary of the company’s stock option activity and certain information concerning the company’s outstanding options are presented below.

		Weighted		Weighted Average
	Number	Average		Grant Date
	of Options	Exercise Price		Fair Value
Outstanding options as of January 1, 2015	1,398,515		$14.62		$5.61
Exercised	(753,159)		$14.75		$5.75
Forfeited	(49,411)		$15.02		$5.87
As of December 31, 2015	595,945		$14.43		$5.41
Exercised	(570,197)		$14.41		$5.40
Forfeited	(25,748)		$14.96		$5.62
As of December 31, 2016 and 2017	-		N/A		N/A

Schedule Of LTIP Awards

	Maximum
	Shares That	Award
	Could Be Issued	Earned	Award Issued/Issuable
2013 LTIP Award:
Two-year performance period transition award	173,319	159,457	53,154	March 2015
			66,252	March 2016
			40,051	March 2017
Three-year performance period award	173,319	149,060	74,179	March 2016
			37,441	March 2017
			37,440	March 2018
2014 LTIP Award:
Three-year performance period award	204,741	204,741	68,249	March 2017
			68,247	March 2018
			68,245	March 2019
2015 LTIP Award:
Three-year performance period award	236,434	236,434	78,813	March 2018
			78,812	March 2019
			78,809	March 2020
2016 LTIP Award:
Three-year performance period award	324,469	*	*
2017 LTIP Award:
Three-year performance period award	182,274	*	*
Two-year performance period transition award	16,779	*	*
One-year performance period transition award	28,379	25,541	8,514	March 2018
			8,514	March 2019
			8,513	March 2020

* Not yet earned as performance period not complete.