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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2014
Subsequent Event [Line Items]
Subsequent Events [Text Block]	Subsequent Events During the first quarter of 2015, the Company entered into six interest rate cap agreements with a combined notional amount of $400.0 million. Under the agreements, the Company made premium payments totaling $0.5 million to the counterparties in exchange for the right to receive payments equal to the amount, if any, by which three-month LIBOR exceeds 2.0% during the agreement period. The interest rate cap agreements are effective from January 14, 2015 through January 14, 2017. On February 10, 2015, the Company announced that its board of directors declared a cash dividend on the Company's common stock of $0.0675 per share. The dividend will be paid on March 10, 2015 to all stockholders of record as of the close of business on February 25, 2015. Future dividends will be subject to the approval of the Company's board of directors.