Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Gain/(Loss), Net of Tax [Member]	Retained Earnings/(Accumulated Deficit) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance at Dec. 31, 2019	$ 1	$ 200,800	$ (723)	$ (4,871)	$ (8)	$ 17,584	$ (8)	$ 212,791
Balance (in shares) at Dec. 31, 2019	12,105		15
Stock-based Compensation Expense		10,543						10,543
Treasury Stock Purchases for Restricted Stock Vests			$ (1,523)					(1,523)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			61
Issuance of Common Shares upon Stock Option and ESPP Exercise		449						449
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	14
Issuance of Restricted Stock Awards (in shares)	304
Gains/(losses) on interest rate swap, net of tax				(8,239)				(8,239)
Net (loss)/income						(18,913)		(18,913)
Balance at Sep. 30, 2020	$ 1	211,792	$ (2,246)	(13,110)		(1,337)		195,100
Balance (in shares) at Sep. 30, 2020	12,423		76
Balance at Jun. 30, 2020	$ 1	209,409	$ (2,246)	(14,049)		(1,771)		191,344
Balance (in shares) at Jun. 30, 2020	12,380		58
Stock-based Compensation Expense		2,383						2,383
Treasury Stock Purchases for Restricted Stock Vests (in shares)			18
Issuance of Restricted Stock Awards (in shares)	43
Gains/(losses) on interest rate swap, net of tax				939				939
Net (loss)/income						434		434
Balance at Sep. 30, 2020	$ 1	211,792	$ (2,246)	(13,110)		(1,337)		195,100
Balance (in shares) at Sep. 30, 2020	12,423		76
Balance at Dec. 31, 2020	$ 1	214,354	$ (2,246)	(11,437)		(4,972)		195,700
Balance (in shares) at Dec. 31, 2020	12,430		76
Stock-based Compensation Expense		7,521						7,521
Treasury Stock Purchases for Restricted Stock Vests			$ (889)					(889)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			28
Issuance of Common Shares upon Stock Option and ESPP Exercise		336						336
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	12
Issuance of Restricted Stock Awards (in shares)	463
Restricted Stock Awards Forfeitures (in shares)	(81)		(21)
Gains/(losses) on interest rate swap, net of tax				7,202				7,202
Net (loss)/income						(18,467)		(18,467)
Balance at Sep. 30, 2021	$ 1	222,211	$ (3,135)	(4,235)		(23,439)		191,403
Balance (in shares) at Sep. 30, 2021	12,824		83
Balance at Jun. 30, 2021	$ 1	219,403	$ (3,062)	(5,433)		(18,992)		191,917
Balance (in shares) at Jun. 30, 2021	12,826		80
Stock-based Compensation Expense		2,808						2,808
Treasury Stock Purchases for Restricted Stock Vests			$ (73)					(73)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			3
Issuance of Restricted Stock Awards (in shares)	6
Restricted Stock Awards Forfeitures (in shares)	(8)
Gains/(losses) on interest rate swap, net of tax				1,198				1,198
Net (loss)/income						(4,447)		(4,447)
Balance at Sep. 30, 2021	$ 1	$ 222,211	$ (3,135)	$ (4,235)		$ (23,439)		$ 191,403
Balance (in shares) at Sep. 30, 2021	12,824		83