Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

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
2015	$	441	96,873	97,314
2016	448		69,875	70,323
2017	323		51,811	52,134
2018	26		32,985	33,011
2019	10		21,164	21,174
Thereafter	—		24,404	24,404
Total payments	1,248		297,112	298,360
Less amount representing interest	103
Present value of capitalized lease payments	$	1,145