The following table presents certain information regarding interest for the periods presented:



	Three Months Ended December 31,
in thousands	2018			2017
Capitalized interest in inventory, beginning of period	$	144,645		$	139,203
Interest incurred	24,921			25,555
Capitalized interest impaired	(115		)	—
Interest expense not qualified for capitalization and included as other expense ^(a)	(242		)	(3,435		)
Capitalized interest amortized to home construction and land sales expenses ^(b)	(17,323		)	(16,476		)
Capitalized interest in inventory, end of period	$	151,886		$	144,847

^(a) The amount of interest we are able to capitalize is dependent upon our qualified inventory balance, which considers the status of our inventory holdings. Our qualified inventory balance includes the majority of our homes under construction and development projects in progress, but excludes land held for future development and land held for sale.

^(b)Capitalized interest amortized to home construction and land sales expenses varies based on the number of homes closed during the period and land sales, if any, as well as other factors.