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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets:
Available-for-sale securities	$ 20,213	$ 13,973
Interest rate cap		0
Liabilities:
Interest rate swaps	2,637	4,007
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Available-for-sale securities	20,213	13,973
Interest rate cap		0
Liabilities:
Interest rate swaps	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Available-for-sale securities	0	0
Interest rate cap		0
Liabilities:
Interest rate swaps	2,637	4,007
Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale securities	0	0
Interest rate cap		0
Liabilities:
Interest rate swaps	$ 0	$ 0

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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