Schedule of Fair Values Of Financial Instruments by Balance Sheet Grouping (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Fair Values Of Financial Instruments by Balance Sheet Grouping [Table Text Block]

The fair values at December 31, 2017 and 2016 do not reflect subsequent changes in the economy, interest rates, tax rates, and other variables that may affect the determination of fair value.

	December 31, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
			(in thousands)
Assets
Cash and cash equivalents	$	176,274	$	176,274	$	133,565	$	133,565
Restricted cash	311,061		311,061		—		—
Foreign exchange forwards	41		41		169		169
Interest rate swaps	2,370		2,370		1,830		1,830
Interest rate caps	489		489		946		946
Liabilities
Credit facility
USD denominated term loan	$	194,063	$	192,295	$	208,125	$	205,676
Multicurrency revolving line of credit	125,414		124,100		97,167		95,906
Senior notes	300,000		301,125		—		—
Interest rate swaps	—		—		934		934
Foreign exchange forwards	289		289		449		449