Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments for Capital and Operating Leases [Table Text Block]

Future minimum lease payments under non-cancelable capital and operating leases (with initial or remaining lease terms in excess of one year) as of December 31:

	Capital		Operating	Total Future Payments
2016	$	1,385	95,407	96,792
2017	1,257		76,748	78,005
2018	1,139		54,306	55,445
2019	972		34,907	35,879
2020	555		20,263	20,818
Thereafter	4,537		15,454	19,991
Total payments	9,845		297,085	306,930
Less amount representing interest	1,913
Present value of capitalized lease payments	$	7,932