Stock Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Information Concerning Restricted Stock Awards

The following table summarizes certain information concerning restricted stock awards:

	2015			Weighted Average Grant Price per Share		2014			Weighted Average Grant Price per Share		2013			Weighted Average Grant Price per Share
Unvested shares outstanding at beginning of year		1,354,093		$	11.86		1,729,033		$	10.23		1,913,073		$	9.17
Granted		664,337			13.25		387,165			13.50		361,664			11.10
Net adjustment due to performance		13,115			19.74		(36,600	)		12.01		165,545			9.60
Vested		(484,010	)		10.70		(707,074	)		8.81		(734,129	)		7.90
Forfeited		(41,130	)		13.24		(65,399	)		11.72		(37,828	)		10.42
Dividend reinvestment		42,039			11.86		46,968			12.66		60,708			11.82
Unvested shares outstanding at end of year		1,548,444			12.85		1,354,093			11.86		1,729,033			10.23

Components of Restricted Stock Awards

The components of the restricted stock awards as of December 31, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested shares		632,054		916,390		1,548,444
Unrecognized compensation expense	$	3,737	$	5,542	$	9,279
Intrinsic value	$	8,432	$	12,225	$	20,657
Weighted average remaining life (in years)		1.92		2.58		2.31

Summary of Information Concerning Stock Option Awards

The following table summarizes certain information concerning stock options:

	2015			Weighted Average Price per Share		2014			Weighted Average Price per Share		2013			Weighted Average Price per Share
Options outstanding at beginning of year		568,834		$	8.86		533,524		$	11.50		640,050		$	13.21
Assumed from acquisitions		—			—		805,507			7.39		274,964			11.16
Exercised		(93,822	)		5.94		(690,973	)		7.75		(69,429	)		7.46
Forfeited		(39,672	)		15.66		(79,224	)		21.40		(312,061	)		15.58
Options outstanding and exercisable at end of year		435,340			8.86		568,834			8.86		533,524			11.50

Summary of Stock Options Outstanding

The following table summarizes information about stock options outstanding at December 31, 2015:

Range of Exercise Prices	Options Outstanding and Exercisable		Weighted Average Remaining Contractual Years		Weighted Average Exercise Price
$3.45 - $5.18		147,461		4.12	$	4.74
$5.19 - $7.78		91,824		1.69		6.17
$11.69 - $17.54		190,285		1.74		12.68
$26.33 - $36.42		5,770		0.84		31.25
		435,340

Summary of Stock Options Exercised

The following table summarizes certain information relating to stock options exercised:

Year Ended December 31	2015		2014		2013
Proceeds from stock options exercised	$	557	$	3,292	$	365
Tax benefit recognized from stock options exercised		130		808		79
Intrinsic value of stock options exercised		693		3,289		318