Business Combinations (Schedule Of Fair Values Of Assets Acquired And Liabilities Assumed) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 14, 2018	Dec. 31, 2017	Oct. 31, 2017	Aug. 04, 2017
Assets acquired and liabilities assumed
Goodwill	$ 30,620		$ 27,363
UCP, Inc [Member]
Assets acquired and liabilities assumed
Cash and cash equivalents					$ 20,264
Accounts receivable					7,897
Inventories					390,234
Prepaid expenses and other assets					6,988
Property and equipment, net					717
Deferred tax asset, net					11,984
Goodwill					5,713
Total assets					443,797
Accounts payable					10,712
Accrued expenses and other liabilities					71,130
Notes payable					152,919
Total liabilities					234,761
Purchase price/Net equity					$ 209,036
Sundquist Homes [Member]
Assets acquired and liabilities assumed
Accounts receivable				$ 11
Inventories				55,077
Prepaid expenses and other assets				1,050
Property and equipment, net				142
Total assets				56,280
Accounts payable				3,646
Accrued expenses and other liabilities				2,431
Total liabilities				6,077
Purchase price/Net equity				$ 50,203
Wade Jurney Homes [Member]
Assets acquired and liabilities assumed
Cash and cash equivalents		$ 9,464
Cash held in escrow		260
Accounts receivable		1,042
Inventories		156,828
Prepaid expenses and other assets		7,710
Amortizable intangible assets		3,375
Goodwill		3,542
Total assets		182,221
Accounts payable		12,516
Accrued expenses and other liabilities		2,349
Senior notes and revolving line of credit		94,231
Total liabilities		109,096
Purchase price/Net equity		$ 73,125