Summary of Bank Borrowings and Capital Lease Obligations Footnote (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
ERP Note Payable 1 [Member]
Debt Instrument, Issuance Date	Dec. 10, 2012
Debt Instrument, Face Amount	$ 6.6
Debt Instrument, Maturity Date	Sep. 01, 2016
Debt Instrument, Periodic Payment	0.4
Debt Instrument, Interest Rate, Stated Percentage	2.63%
ERP Note Payable 2 [Member]
Debt Instrument, Issuance Date	Mar. 25, 2013
Debt Instrument, Face Amount	3.1
Debt Instrument, Maturity Date	Sep. 01, 2016
Debt Instrument, Periodic Payment	0.2
Debt Instrument, Interest Rate, Stated Percentage	2.45%
ERP Note Payable 3 [Member]
Debt Instrument, Issuance Date	Jun. 25, 2013
Debt Instrument, Face Amount	2.4
Debt Instrument, Maturity Date	Mar. 01, 2017
Debt Instrument, Periodic Payment	$ 0.2
Debt Instrument, Interest Rate, Stated Percentage	2.79%