Long-term Borrowings and Capital Lease Obligations (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Long-term Debt

Long-term debt as of December 31, 2015 and 2014 consists of:

(in thousands)	2015		2014
2.375% Senior Notes due June 1, 2018 (5 year tranche), net of discount	$	549,919		549,889
3.75% Senior Notes due June 1, 2023 (10 year tranche), net of discount		546,746		546,379
LIBOR + 1.125%, unsecured term loan, due April 8, 2018, with quarterly principal and interest payments		175,000		185,000
LIBOR + 1.125%, unsecured term loan, due September 10, 2017, with quarterly principal and interest payments		120,000		131,250
1.38% note payable due January 31, 2017, with monthly interest and principal payments		30,000		—
1.50% note payable, due September 30, 2016, with monthly interest and principal payments		5,132		11,886
LIBOR + 2.0%, unsecured term loan, due December 7, 2017, with monthly interest payments and principal paid at maturity		3,202		1,396
1.50% note payable, due January 31, 2016, with monthly interest and principal payments		336		4,332
1.50% note payable, due December 31, 2015, with monthly interest and principal payments		—		10,075
1.50% note payable, due July 31, 2015, with monthly interest and principal payments		—		1,709
Total debt		1,430,335		1,441,916
Less current portion		50,364		43,784
Noncurrent portion of long-term debt	$	1,379,971		1,398,132

Required Annual Principal Payments on Long-term Debt

Required annual principal payments on long-term debt for the five years subsequent to December 31, 2015 are summarized as follows:

(in thousands)
2016	$	50,364
2017		143,305
2018		690,000
2019		—
2020		—

Capital Lease Obligations

Capital lease obligations as of December 31, 2015 and 2014 consist of:

(in thousands)	2015		2014
Capital lease obligations	$	7,131		14,101
Less current portion		3,468		7,127
Noncurrent portion of capital leases	$	3,663		6,974

Future Minimum Lease Payments under Capital Leases

The future minimum lease payments under capital leases as of December 31, 2015 are summarized as follows:

(in thousands)
2016	$	3,611
2017		2,687
2018		1,001
2019		63
2020		—
Total minimum lease payments		7,362
Less amount representing interest		(231	)
Principal minimum lease payments	$	7,131