Credit Facilities (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Outstanding Amount of Credit Facilities

Amounts outstanding under the Company’s credit facilities, net of debt issuance cost, consist of the following:

	December 31
	2017			2016
	(In Thousands)
Unsecured Revolving Credit Facility, $1,500,000,000, LIBOR plus 1.375% variable	$	590,000		$	325,000
Unsecured Term Loan A, $1,100,000,000, LIBOR plus 1.375% variable	1,100,000			—
Unsecured term notes:
July 29, 2016, Series G Senior Unsecured Notes, $50,000,000, 2.64% fixed, due July 29, 2021	50,000			50,000
December 2, 2013, Series F Senior Unsecured Notes, $250,000,000, 3.24% fixed, due December 2, 2023	250,000			250,000
October 30, 2017, Series J Senior Unsecured Notes, €225,000,000, 1.40% fixed, due October 30, 2024	269,955			—
November 30, 2016, Series H Senior Unsecured Notes, $250,000,000, 3.24% fixed, due November 30, 2026	250,000			250,000
October 30, 2017, Series K Senior Unsecured Notes, €250,000,000, 1.81% fixed, due October 30, 2027	299,950			—
October 30, 2017, Series I Senior Unsecured Notes, $120,000,000, 3.70% fixed, due October 30, 2027	120,000			—
October 30, 2017, Series L Senior Unsecured Notes, €125,000,000, 2.02% fixed, due October 30, 2029	149,975			—
October 30, 2017, Series M Senior Unsecured Notes, €100,000,000, 2.32% fixed, due October 30, 2032	119,980			—
Acquired debt includes German Unsecured Revolving Credit Facility, 2.85%, due June 30, 2019	49,990			—
Total unsecured debt	3,249,850			875,000
Unamortized debt issuance costs	(4,841		)	—
Total debt	3,245,009			875,000
Less debt due within one year	694,989			325,000
Long-term debt, excluding current portion	$	2,550,020		$	550,000

Schedule of Maturities of Long-term Debt

Approximate maturities under the Company’s credit facilities, net of debt issuance costs, are as follows (in thousands):

2018, net of debt issuance costs of $633	$	694,356
2019	81,867
2020	109,366
2021	186,866
2022	714,366
Thereafter	1,458,188
	$	3,245,009