Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Summary of Changes in Shareholders' Equity

A summary of the changes in shareholders’ equity for the years ended December 31, 2016, 2015 and 2014 is as follows (in thousands, except per share amounts):

	COMMON STOCK				ADDITIONAL PAID-IN		DIVIDENDS PAID IN EXCESS
	SHARES		AMOUNT		CAPITAL		OF EARNINGS			TOTAL
BALANCE, DECEMBER 31, 2013		33,397	$	334	$	462,397	$	(47,640	)	$	415,091
Net earnings								23,418			23,418
Dividends declared — $0.960 per share								(32,402	)		(32,402	)
Stock-based compensation		20		—		917		—			917
BALANCE, DECEMBER 31, 2014		33,417	$	334	$	463,314	$	(56,624	)	$	407,024
Net earnings								37,410			37,410
Dividends declared — $1.15 per share								(38,897	)		(38,897	)
Stock-based compensation		5		—		1,024		—			1,024
BALANCE, DECEMBER 31, 2015		33,422	$	334	$	464,338	$	(58,111	)	$	406,561
Net earnings								38,411			38,411
Dividends declared — $1.03 per share								(35,385	)		(35,385	)
Shares issued pursuant to ATM Program, net		653		7		14,879		—			14,886
Shares issued pursuant to stock dividends		256		3		4,409		—			4,412
Shares issued pursuant to dividend reinvestment		43		—		897		—			897
Stock-based compensation		19		—		1,136		—			1,136
BALANCE, DECEMBER 31, 2016		34,393	$	344	$	485,659	$	(55,085	)	$	430,918