(Loss) Earnings Per Share and Equity - Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance, value	$ 791,933	$ 890,552	$ 851,671	$ 895,970
Amounts reclassified from accumulated other comprehensive income (loss) to:
Other gains and (losses)	(1,064)	(1,302)	1,008	(1,474)
Interest expense	10,354	12,044	20,843	24,401
Net current-period other comprehensive income (loss)	11,362	1,687	(14,543)	(2,793)
Ending equity balance, value	802,516	876,973	802,516	876,973
Accumulated Other Comprehensive Loss
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance, value	(79,912)	(54,915)	(56,535)	(50,593)
Amounts reclassified from accumulated other comprehensive income (loss) to:
Ending equity balance, value	(69,946)	(53,559)	(69,946)	(53,559)
Gains and Losses on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance, value	(1,685)	1,977	138	2,215
Amounts reclassified from accumulated other comprehensive income (loss) to:
Ending equity balance, value	(2,629)	6	(2,629)	6
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance, value	(78,227)	(56,892)	(56,673)	(52,808)
Amounts reclassified from accumulated other comprehensive income (loss) to:
Ending equity balance, value	(67,317)	(53,565)	(67,317)	(53,565)
AOCI Including Portion Attributable to Noncontrolling Interest
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	11,407	2,083	(14,296)	(2,016)
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive income (loss)	11,362	1,687		(2,793)
AOCI Including Portion Attributable to Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income (loss) to:
Other gains and (losses)	(499)	(377)	(897)	(734)
Interest expense	454	(19)	650	(43)
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	(899)	(1,575)	(2,520)	(1,432)
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive income (loss)	(944)	(1,971)		(2,209)
Gains and (Losses) on Derivative Instruments | Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income (loss) to:
Other gains and (losses)	(499)	(377)	(897)	(734)
Interest expense	454	(19)	650	(43)
Net current-period other comprehensive income (loss)			(2,767)
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	12,306	3,658	(11,776)	(584)
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive income (loss)	12,306	3,658		(584)
Foreign Currency Translation Adjustments | Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income (loss) to:
Other gains and (losses)	0	0	0	0
Interest expense	0	0	0	0
Net current-period other comprehensive income (loss)			(11,776)
Noncontrolling Interest
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive loss (income) attributable to noncontrolling interests	(1,396)	(331)	1,132	(173)
Ending equity balance, value	(69,946)		(69,946)
Gains and (Losses) on Derivative Instruments
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive loss (income) attributable to noncontrolling interests	0	0	0	0
Foreign Currency Translation Adjustments
Amounts reclassified from accumulated other comprehensive income (loss) to:
Net current-period other comprehensive loss (income) attributable to noncontrolling interests	$ (1,396)	$ (331)	$ 1,132	$ (173)