Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment to redeemable noncontrolling interest	$ 28,390
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of interest rate swaps		1
TROR [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of TROR borrowings subject to fair value adjustments		366,985