Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Details)

v3.8.0.1
Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) at beginning of period $ (13,296) $ (10,773) $ (22,617) $ (20,836)
Other comprehensive income (loss) before reclassifications 402 3,174 10,315 14,736
Amounts reclassified from other comprehensive income (1,035) 665 (1,627) (834)
Net other comprehensive income (loss) during the period (633) 3,839 8,688 13,902
Accumulated other comprehensive income (loss) at end of period (13,929) (6,934) (13,929) (6,934)
Unrealized Gains (Losses) on Available-For-Sale Securities [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) at beginning of period (4) 0 (4) (2)
Other comprehensive income (loss) before reclassifications 0 (4) 0 (2)
Amounts reclassified from other comprehensive income 0 0 0 0
Net other comprehensive income (loss) during the period 0 (4) 0 (2)
Accumulated other comprehensive income (loss) at end of period (4) (4) (4) (4)
Unrealized Holding Gains (Losses) on Derivative Transactions [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) at beginning of period (794) (3,337) 6,773 6,087
Other comprehensive income (loss) before reclassifications (7,391) (319) (14,366) (8,244)
Amounts reclassified from other comprehensive income (1,035) 665 (1,627) (834)
Net other comprehensive income (loss) during the period (8,426) 346 (15,993) (9,078)
Accumulated other comprehensive income (loss) at end of period (9,220) (2,991) (9,220) (2,991)
Foreign Currency Translation Adjustments [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) at beginning of period (12,498) (7,436) (29,386) (26,921)
Other comprehensive income (loss) before reclassifications 7,793 3,497 24,681 22,982
Amounts reclassified from other comprehensive income 0 0 0 0
Net other comprehensive income (loss) during the period 7,793 3,497 24,681 22,982
Accumulated other comprehensive income (loss) at end of period $ (4,705) $ (3,939) $ (4,705) $ (3,939)