Other Expenses, Net (Tables)

6 Months Ended

Jun. 30, 2017

Other Expenses, Net [Abstract]

Schedule of other expenses, net

	Three-Month Periods Ended  June 30,						Six-Month Periods Ended June 30,
	2017			2016			2017			2016
Interest expense	$	43,493		$	44,935		$	83,395		$	81,841
Interest income		(6,418	)		(13,410	)		(12,375	)		(26,745	)
Other gains		(679	)		(226	)		(4,382	)		(411	)
Other expenses, net	$	36,396		$	31,299		$	66,638		$	54,685