Shareholders' Equity and Common Stock Equivalents (Tables)

12 Months Ended

Dec. 31, 2015

Shareholders Equity And Stock Options [Abstract]

Summary of stock units and stock options outstanding under the Comprehensive Plan

As further described in the paragraphs below, outstanding stock units and stock options under the Comprehensive Plan were as follows:

	December 31,
	2015	2014	2013
Common stock units related to deferred compensation for Directors	85,200	87,993	118,062
Common stock units related to deferred compensation for employees	55,443	69,598	111,981
Stock options	669,693	634,437	956,814
Restricted common stock units related to incentive compensation	1,442,325	1,590,138	1,663,190
Total	2,252,661	2,382,166	2,850,047

Summary of changes in outstanding options

Changes in outstanding options were as follows:

	Weighted Average			Range of		Options
	Option Price			Option Prices					Vested and
	per Share			per Share		Outstanding			Exercisable
December 31, 2014		$	21.22		$  6.91-$30.24		634,437			208,578
Granted		$	32.44		$32.35-$33.41		142,908			-
Vested		$	21.23		$13.83-$30.24		-			158,586
Exercised		$	17.71		$13.83-$28.88		(85,532	)		(85,532	)
Forfeited		$	23.10		$17.01-$28.88		(22,120	)		-
Expired			-		-		-			-
December 31, 2015		$	24.00		$  6.91-$33.41		669,693			281,632

Summary of options outstanding segregated by ranges of exercise prices

Option information segregated by ranges of exercise prices was as follows:

December 31, 2015

Total Outstanding Options

Vested and Exercisable Options

Weighted

Weighted

Weighted

Weighted

Range of

Average

Average

Average

Average

Option Prices

Option Price

Remaining

Option Price

Remaining

per Share

Options

per Share

Term

Options

per Share

Term

$  6.91-$17.01

103,368

$16.14

1.9 years

103,368

$16.14

1.9 years

$17.32-$22.69

257,921

$19.32

3.7 years

139,216

$18.98

3.6 years

$28.88-$33.41

308,404

$30.54

8.6 years

39,048

$28.94

8.1 years

Total

$  6.91-$33.41

669,693

$24.00

5.7 years

281,632

$19.32

3.6 years

Summary of changes in outstanding restricted common stock units

Changes in outstanding restricted common stock units were as follows:

	Total Outstanding Units				Vested Units
				Weighted Average				Weighted Average
				Grant Date Fair				Grant Date Fair
	Units			Value per Unit	Units			Value per Unit
December 31, 2014		1,590,138		$21.34		853,054		$14.36
Granted (1)		225,180		$34.42		-		-
Vested		-		-		303,057		$19.39
Forfeited		(66,794	)	$25.60		-		-
Distributed (2)		(306,199	)	$16.13		(306,199	)	$16.13
December 31, 2015		1,442,325		$24.29		849,912		$15.51

(1)	Includes dividends reinvested into additional restricted common stock units.
(2)	Includes distributed units which were utilized to satisfy withholding taxes due on the distribution.