Organization and Summary of Significant Accounting Policies - Impact of the Adoption (Details) - USD ($)	Dec. 31, 2021	Oct. 01, 2021	Sep. 30, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Principal	$ 316,250,000	$ 316,250,000
Unamortized debt discount		0
Deferred financing costs, net		(4,779,000)
Net carrying amount	311,844,000	311,471,000	$ 264,186,000	$ 254,535,000
Deferred tax asset, net	15,623,000	15,585,000	9,746,000	10,000,000
Deferred tax liability, net	221,000	(356,000)	3,684,000	172,000
Additional paid-in capital	339,955,000	339,049,000	403,312,000	398,269,000
Retained earnings	$ 369,359,000	$ 353,638,000	326,781,000	$ 322,468,000
As Reported September 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Principal			316,250,000
Unamortized debt discount			(48,785,000)
Deferred financing costs, net			(3,279,000)
Net carrying amount			264,186,000
Deferred tax asset, net			9,746,000
Deferred tax liability, net			3,684,000
Additional paid-in capital			403,312,000
Retained earnings			326,781,000
Adjustments | Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Principal			0
Unamortized debt discount			48,785,000
Deferred financing costs, net			(1,500,000)
Net carrying amount			47,285,000
Deferred tax asset, net			5,839,000
Deferred tax liability, net			(4,040,000)
Additional paid-in capital			(64,263,000)
Retained earnings			$ 26,857,000