Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Unvested Restricted Stock Units and Performance Units Grants Outstanding

Unvested restricted stock units and performance units outstanding as of December 31, 2015, 2014 and 2013, and changes during the years ended on those dates, are presented in the following table:

	December 31,
	2015			2014			2013
Beginning balance		718,892			626,812			587,629
Granted - Performance		185,050			228,607			114,463
Granted - Non Performance		32,158			59,523			155,463
Total Granted		217,208			288,130			269,926
Vested - Performance Earned		—			—			(15,714	)
Vested - Performance Unearned		(68,080	)		(93,453	)		(57,585	)
Vested - Non Performance		(135,600	)		(90,263	)		(60,183	)
Total Vested		(203,680	)		(183,716	)		(133,482	)
Forfeited		(35,905	)		(12,334	)		(97,261	)
Ending balance		696,515			718,892			626,812

Stock Options Outstanding

Stock options outstanding as of December 31, 2015, 2014 and 2013 are as follows:

	December 31,
	2015					2014					2013
				Average					Average					Average
	# of Shares			Exercise Price		# of Shares			Exercise Price		# of Shares			Exercise Price
Beginning balance		1,500		$	36.03		6,750		$	30.65		90,250		$	29.94
Granted		—			—		—			—		—			—
Exercised		(1,500	)	$	36.03		(5,250	)	$	29.11		(83,500	)	$	29.88
Expired or forfeited		—			—		—			—		—			—
Ending balance		—		$	—		1,500		$	36.03		6,750		$	30.65
Number of options exercisable		—		$	—		1,500		$	36.03		6,750		$	30.65