Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member]

Summary of Share Based Compensation Activity

The following table summarizes RSU and PSA activity during the past three years:

Units	2016			2015			2014
Balance at January 1,		674,523			888,942			1,001,814
Granted		302,722			164,666			178,882
Forfeited		(148,232	)		(92,183	)		(47,379	)
Shares delivered		(149,975	)		(286,902	)		(244,375	)
Balance at December 31,		679,038			674,523			888,942

Compensation Expense for Stock Option Activity

	2016		2015		2014
Compensation expense	$	3,154	$	1,758	$	2,652

Stock Only Stock Appreciation Rights (SOSARs) [Member]

Summary of Share Based Compensation Activity

The following table sets forth information related to outstanding SOSARS:

	2016					2015					2014
SOSARS	Shares			Wtd Avg Exercise Price		Shares			Wtd Avg Exercise Price		Shares			Wtd Avg Exercise Price
Outstanding at January 1,		2,199,742		$	17.82		1,864,707		$	16.20		1,977,133		$	13.91
Granted		743,925			17.54		423,590			24.62		281,881		29.78
Exercised		(61,190	)		10.70		(70,347	)		14.12		(364,465	)		13.99
Canceled / forfeited		(145,861	)		22.80		(18,208	)		25.41		(29,842	)		19.36
Outstanding at December 31,		2,736,616		$	17.64		2,199,742		$	17.82		1,864,707		$	16.20
Exercisable at December 31,		1,740,591			16.19		1,504,599		14.48			1,285,998			12.94
Vested and expected to vest		2,725,611					2,178,708					1,754,295
SOSAR Grants
Weighted average grant date    fair value per share	$	4.07				$	7.46				$	9.81
Aggregate grant date    fair value (in thousands)	$	3,013				$	3,134				$	2,764
Black-Scholes assumptions
Dividend yield		2.85	%				1.94	%				1.48	%
Risk free rate of return		1.34	%				1.64	%				1.74	%
Volatility		31.97	%				36.38	%				37.59	%
Expected life	6					6					6
Compensation expense    (in thousands)	$	2,735				$	2,645				$	2,086