Investment in Unconsolidated Entities (Summary of Financial Information of Investment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Company’s share in net earnings of unconsolidated entities	$ 3,891	$ 2,565
Assets	1,079,916		$ 988,847
Liabilities	387,454		325,895
Stockholders' Equity Attributable to Parent	666,131	542,982	640,242	$ 523,168
Stockholders' Equity Attributable to Noncontrolling Interest	10,630	10,900	9,167	13,227
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	676,761	553,882	649,409	536,395
Liabilities and Equity	1,079,916		988,847
Total revenues	234,479	213,267
Net income	27,761	16,716
Cash		105,860		33,269
Schedule of Equity Method Investments [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	10,630	10,900	9,167	13,227
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	676,761	553,882	649,409	536,395
Total revenues	234,479	213,267
Net income	27,761	16,716
Equity in income of unconsolidated entities	3,891	2,565
Assets	1,079,916		988,847
Cash		105,860		33,269
Liabilities	387,454		325,895
Stockholders' Equity Attributable to Parent	666,131	542,982	640,242	$ 523,168
Liabilities and Equity	1,079,916		988,847
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Income Statement [Abstract]
Company’s share in net earnings of unconsolidated entities	3,891	2,565
Assets	183,636		166,248
Liabilities	94,335		78,961
Stockholders' Equity Attributable to Parent	45,484		43,451
Stockholders' Equity Attributable to Noncontrolling Interest	43,817		43,836
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	89,301		87,287
Liabilities and Equity	183,636		166,248
Total revenues	39,721	35,365
Net income	7,770	5,550
Cash	13,226		12,765
Schedule of Equity Method Investments [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	43,817		43,836
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	89,301		87,287
Total revenues	39,721	35,365
Net income	7,770	5,550
Equity in income of unconsolidated entities	3,891	2,565
Accounts and Other Receivables, Net, Current	2,109		1,815
Financing Receivable, after Allowance for Credit Loss	5,942		5,942
Financing Receivable, Held-for-Sale	20,309		14,530
Inventory, Net	132,192		122,819
Other Assets, Current	9,858		8,377
Accounts Payable, Current	6,445		7,171
Accrued Liabilities, Current	12,624		11,148
Notes Payable, Current	75,266		60,642
Costs and Expenses	31,951	$ 29,815
Assets	183,636		166,248
Cash	13,226		12,765
Liabilities	94,335		78,961
Stockholders' Equity Attributable to Parent	45,484		43,451
Liabilities and Equity	$ 183,636		$ 166,248