Stock-Based Compensation Plans (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Plan $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]
Number of compensation plans | Plan	2
Shares available for grant under 2014 LTIP Plan (in shares)	560,000
Additional Disclosures [Abstract]
Stock based compensation expense | $	$ 3,435	$ 4,358	$ 3,818
Tax expense (benefit) recognized related to all awards | $	98	$ 143	$ (192)
Total compensation cost related to unvested equity awards | $	$ 3,747
Weighted-average period of recognition of cost	2 years
Service-Based Restricted Stock Awards [Member]
Shares or Units and Rights [Roll Forward]
Outstanding, beginning balance (in shares)	249,142	254,490	249,706
Granted/Issued (in shares)	137,768	141,722	135,986
Awards vested or rights exercised (in shares)	(133,364)	(132,872)	(128,691)
Forfeited (in shares)	(18,736)	(14,198)	(2,511)
Outstanding, ending balance (in shares)	234,810	249,142	254,490
Restricted units expected to vest (in shares)	234,810
Exercisable, ending balance (in shares)	0	0	0
Weighted-Average Award Price [Roll Forward]
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 22.05	$ 21.88	$ 21.22
Granted/Issued (in dollars per share) | $ / shares	20.24	22.73	21.99
Awards vested or rights exercised (in dollars per share) | $ / shares	22.27	22.45	20.73
Forfeited (in dollars per share) | $ / shares	21.25	21.94	21.38
Outstanding, ending balance (in dollars per share) | $ / shares	20.93	22.05	21.88
Restricted units expected to vest (in dollars per share) | $ / shares	20.93
Exercisable, ending balance (in dollars per share) | $ / shares	$ 0	$ 0	$ 0
Additional Disclosures [Abstract]
Fair value of vested shares | $	$ 2,491	$ 2,594	$ 3,294
Aggregate intrinsic value of outstanding awards | $	$ 4,734
Vesting period of awards	4 years
Performance-Based Restricted Stock Awards [Member]
Shares or Units and Rights [Roll Forward]
Outstanding, beginning balance (in shares)	209,754	179,774	147,614
Granted/Issued (in shares)	113,522	103,940	63,396
Awards vested or rights exercised (in shares)	(57,351)	(48,661)	(28,715)
Forfeited (in shares)	(51,116)	(25,299)	(2,521)
Outstanding, ending balance (in shares)	214,809	209,754	179,774
Restricted units expected to vest (in shares)	136,668
Exercisable, ending balance (in shares)	0	0	0
Weighted-Average Award Price [Roll Forward]
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 21.56	$ 21.42	$ 22.35
Granted/Issued (in dollars per share) | $ / shares	20.29	22.95	22.04
Awards vested or rights exercised (in dollars per share) | $ / shares	18.93	24.10	27.81
Forfeited (in dollars per share) | $ / shares	22.45	21.40	20.60
Outstanding, ending balance (in dollars per share) | $ / shares	21.38	21.56	21.42
Restricted units expected to vest (in dollars per share) | $ / shares	21.99
Exercisable, ending balance (in dollars per share) | $ / shares	$ 0	$ 0	$ 0
Additional Disclosures [Abstract]
Fair value of vested shares | $	$ 1,389	$ 988	$ 678
Aggregate intrinsic value of outstanding awards | $	$ 2,755
Performance period	1 year
Vesting period of awards	3 years
Stock-Settled Appreciation Rights [Member]
Shares or Units and Rights [Roll Forward]
Outstanding, beginning balance (in shares)	57,000	57,000	100,875
Granted/Issued (in shares)	0	0	0
Awards vested or rights exercised (in shares)	(49,500)	0	(43,875)
Forfeited (in shares)	0	0	0
Outstanding, ending balance (in shares)	7,500	57,000	57,000
Restricted units expected to vest (in shares)	0
Exercisable, ending balance (in shares)	7,500	57,000	57,000
Weighted-Average Award Price [Roll Forward]
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 18.14	$ 18.14	$ 18.14
Granted/Issued (in dollars per share) | $ / shares	0	0
Awards vested or rights exercised (in dollars per share) | $ / shares	18.14	0	18.14
Forfeited (in dollars per share) | $ / shares	0	0
Outstanding, ending balance (in dollars per share) | $ / shares	18.14	18.14	18.14
Restricted units expected to vest (in dollars per share) | $ / shares	0
Exercisable, ending balance (in dollars per share) | $ / shares	$ 18.14	$ 18.14	$ 18.14
Additional Disclosures [Abstract]
Aggregate intrinsic value of outstanding awards | $	$ 15
Aggregate intrinsic value of vested awards | $	15
Intrinsic value of awards exercised | $	$ 107		$ 284