CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2011	$ 220	$ 130,907	$ 39,742	$ (7,480)	$ 163,389
Balance (in shares) at Dec. 31, 2011	22,020,694
Increase (Decrease) in Stockholders' Equity
Net income			6,012		6,012
Dividends paid			(18,231)		(18,231)
Adjustment for pension and postretirement benefit liability, net of tax of ($3,838) in 2014, ($3,838) in 2013 and ($219) in 2012				349	349
Adjustment for interest rate swap, net of tax of ($102) in 2014, ($102) in 2013 and ($30) in 2012				47	47
Stock based compensation	1	2,165			2,166
Stock based compensation (in shares)	110,302
Balance at Dec. 31, 2012	221	133,072	27,523	(7,084)	153,732
Balance (in shares) at Dec. 31, 2012	22,130,996
Increase (Decrease) in Stockholders' Equity
Net income			11,639		11,639
Dividends paid			(18,699)		(18,699)
Adjustment for pension and postretirement benefit liability, net of tax of ($3,838) in 2014, ($3,838) in 2013 and ($219) in 2012				6,062	6,062
Adjustment for interest rate swap, net of tax of ($102) in 2014, ($102) in 2013 and ($30) in 2012				160	160
Shares withheld on restricted stock vesting		(160)			(160)
Stock based compensation	1	2,586			2,587
Stock based compensation (in shares)	92,458
Balance at Dec. 31, 2013	222	135,498	20,463	(862)	155,321
Balance (in shares) at Dec. 31, 2013	22,223,454
Increase (Decrease) in Stockholders' Equity
Net income			39,961		39,961
Dividends paid			(19,598)		(19,598)
Adjustment for pension and postretirement benefit liability, net of tax of ($3,838) in 2014, ($3,838) in 2013 and ($219) in 2012				(5,350)	(5,350)
Adjustment for interest rate swap, net of tax of ($102) in 2014, ($102) in 2013 and ($30) in 2012				184	184
Shares withheld on restricted stock vesting		(97)			(97)
Stock based compensation	1	2,867			2,868
Stock based compensation (in shares)	59,174
Balance at Dec. 31, 2014	$ 223	$ 138,268	$ 40,826	$ (6,028)	$ 173,289
Balance (in shares) at Dec. 31, 2014	22,282,628