Preproduction Costs Related to Long-Term Supply Arrangements (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Summary of Unamortize Customer-Owned Tooling Costs Included in Non-current Assets and Deferred Tooling Revenues Included in Accrued Expenses and Other Non-current Liabilities

The following tables summarize the unamortized customer-owned tooling costs included in our non-current assets, and the deferred tooling revenues included in accrued expenses and other non-current liabilities:

	March 31, 2018			December 31, 2017
(Dollars in thousands)
Customer-Owned Tooling Costs
Preproduction costs	$	92,232		$	84,198
Accumulated amortization		(73,722	)		(71,409	)
Net preproduction costs	$	18,510		$	12,789
Deferred Tooling Revenues
Accrued expenses	$	5,450		$	4,654
Other non-current liabilities		5,638			1,974
Total deferred tooling revenues	$	11,088		$	6,628