CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	COMMON STOCK [Member]	CAPITAL INEXCESS OF PAR VALUE [Member]	RETAINED EARNINGS [Member]	TREASURY SHARES [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]	DEFERRED COMPENSATION [Member]	Kelkay [Member]	Kelkay [Member] CAPITAL INEXCESS OF PAR VALUE [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative catch-up adjustment related to adoption of ASU 606 | Accounting Standards Update 2014-09 (ASC 606) [Member]	[1]	$ (5,673)			$ (5,673)
Balance at Sep. 30, 2018		474,391	$ 20,380	$ 503,396	550,523	$ (534,830)	$ (34,112)	$ (30,966)
Balance (in Shares) at Sep. 30, 2018			81,520			35,846
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		8,753			8,753
Dividend		(3,143)			(3,143)
Shares withheld on employee taxes on vested equity awards				0
Shares withheld on employee taxes on vested equity awards						83
Shares withheld on employee taxes on vested equity awards		(1,058)				$ (1,058)
Amortization of deferred compensation		856						856
Common stock acquired (in shares)						29
Common stock acquired		(290)				$ (290)
Equity awards granted, net (in shares)			1,201
Equity awards granted, net		0	$ 300	(300)
ESOP allocation of common stock		(8)		(8)
Stock-based compensation		2,933		2,933					$ 250	$ 250
Other comprehensive income, net of tax		(5,450)					(5,450)
Balance at Dec. 31, 2018		$ 471,561	$ 20,680	$ 506,271	$ 550,460	$ (536,178)	$ (39,562)	$ (30,110)
Balance (in Shares) at Dec. 31, 2018			82,721			35,958

[1] See Note 14 - Recent Accounting Pronouncements and Note 3 - Revenue for additional information.