CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Lossses)	Treasury Stock
Balance at beginning of period (in shares) at Dec. 31, 2019		53,473,620
Balance at beginning of period at Dec. 31, 2019	$ 520,988	$ 750	$ 638,917	$ 221,841	$ (3,978)	$ (336,542)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(106,647)			(106,647)
Foreign currency translation	(1,636)				(1,636)
Stock-based compensation (in shares)		141,223
Stock-based compensation	(917)	$ 3	(920)
Stock repurchase (in shares)		(766,122)
Stock repurchase	(10,051)					(10,051)
Common stock dividends	(3,885)			(3,885)
Unrealized (loss) gain on derivative instruments	(3,883)				(3,883)
Balance at end of period (in shares) at Mar. 31, 2020		52,848,721
Balance at end of period at Mar. 31, 2020	393,969	$ 753	637,997	111,309	(9,497)	(346,593)
Balance at beginning of period (in shares) at Dec. 31, 2019		53,473,620
Balance at beginning of period at Dec. 31, 2019	520,988	$ 750	638,917	221,841	(3,978)	(336,542)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(102,906)
Foreign currency translation	(1,056)
Unrealized (loss) gain on derivative instruments	899
Balance at end of period (in shares) at Sep. 30, 2020		52,912,988
Balance at end of period at Sep. 30, 2020	397,365	$ 753	641,236	106,118	(4,135)	(346,607)
Balance at beginning of period (in shares) at Mar. 31, 2020		52,848,721
Balance at beginning of period at Mar. 31, 2020	393,969	$ 753	637,997	111,309	(9,497)	(346,593)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(146)			(146)
Foreign currency translation	318				318
Stock-based compensation (in shares)		57,394
Stock-based compensation	1,333		1,333
Stock repurchase	(14)					(14)
Common stock dividends	(4,507)			(4,507)
Unrealized (loss) gain on derivative instruments	2,264				2,264
Balance at end of period (in shares) at Jun. 30, 2020		52,906,115
Balance at end of period at Jun. 30, 2020	393,217	$ 753	639,330	106,656	(6,915)	(346,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,887			3,887
Foreign currency translation	262				262
Stock-based compensation (in shares)		2,253
Stock-based compensation	1,862		1,862
Stock repurchase (in shares)
Stock repurchase	0
Common stock dividends	(4,425)			(4,425)
Unrealized (loss) gain on derivative instruments	2,518
Unrealized gain on derivative instruments, net of tax	2,518				2,518
Stock option exercises (in shares)		4,620
Stock option exercises	44		44
Balance at end of period (in shares) at Sep. 30, 2020		52,912,988
Balance at end of period at Sep. 30, 2020	397,365	$ 753	641,236	106,118	(4,135)	(346,607)
Balance at beginning of period (in shares) at Dec. 31, 2020		52,536,482
Balance at beginning of period at Dec. 31, 2020	404,879	$ 755	644,695	107,233	7,633	(355,437)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,217			3,217
Foreign currency translation	(303)				(303)
Stock-based compensation (in shares)		101,083
Stock-based compensation	2,032	$ 1	2,031
Stock repurchase (in shares)		(1,038,674)
Stock repurchase	(19,321)					(19,321)
Common stock dividends	(3,967)			(3,967)
Unrealized (loss) gain on derivative instruments	14,530				14,530
Stock option exercises (in shares)		112,400
Stock option exercises	1,235	$ 1	1,234
Balance at end of period (in shares) at Mar. 31, 2021		51,711,291
Balance at end of period at Mar. 31, 2021	402,302	$ 757	647,960	106,483	21,860	(374,758)
Balance at beginning of period (in shares) at Dec. 31, 2020		52,536,482
Balance at beginning of period at Dec. 31, 2020	404,879	$ 755	644,695	107,233	7,633	(355,437)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	26,477
Foreign currency translation	259
Unrealized (loss) gain on derivative instruments	13,974
Balance at end of period (in shares) at Sep. 30, 2021		49,574,651
Balance at end of period at Sep. 30, 2021	386,194	$ 759	652,530	121,495	21,866	(410,456)
Balance at beginning of period (in shares) at Mar. 31, 2021		51,711,291
Balance at beginning of period at Mar. 31, 2021	402,302	$ 757	647,960	106,483	21,860	(374,758)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	12,252			12,252
Foreign currency translation	667				667
Stock-based compensation (in shares)		37,147
Stock-based compensation	2,184	$ 1	2,183
Stock repurchase (in shares)		(1,304,214)
Stock repurchase	(21,981)					(21,981)
Common stock dividends	(4,290)			(4,290)
Unrealized (loss) gain on derivative instruments	8,631				8,631
Stock option exercises (in shares)		19,810
Stock option exercises	215		215
Balance at end of period (in shares) at Jun. 30, 2021		50,464,034
Balance at end of period at Jun. 30, 2021	399,980	$ 758	650,358	114,445	31,158	(396,739)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	11,008			11,008
Foreign currency translation	(105)				(105)
Stock-based compensation (in shares)		1,799
Stock-based compensation	1,673		1,673
Stock repurchase (in shares)		(935,382)
Stock repurchase	(13,717)					(13,717)
Common stock dividends	(3,958)			(3,958)
Unrealized (loss) gain on derivative instruments	(9,187)
Unrealized gain on derivative instruments, net of tax	(9,187)				(9,187)
Stock option exercises (in shares)		44,200
Stock option exercises	500	$ 1	499
Balance at end of period (in shares) at Sep. 30, 2021		49,574,651
Balance at end of period at Sep. 30, 2021	$ 386,194	$ 759	$ 652,530	$ 121,495	$ 21,866	$ (410,456)