Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets:
Interest Rate Derivative Assets, at Fair Value		$ 3,900
Level 1[Member] | Demand Obligation [Member]
Assets:
Interest Rate Derivative Assets, at Fair Value		0
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0
Level 1[Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Interest Rate Derivative Assets, at Fair Value	0
Assets, Fair Value Disclosure	0	0
Liabilities:
Interest rate derivative financial instruments	0	0
Liabilities, Fair Value Disclosure	0	0
Level 2 [Member] | Demand Obligation [Member]
Assets:
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	30,198
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Interest Rate Derivative Assets, at Fair Value	500	3,919
Assets, Fair Value Disclosure	30,732	3,919
Liabilities:
Interest rate derivative financial instruments	23,483	26,078
Liabilities, Fair Value Disclosure	23,483	26,078
Total | Demand Obligation [Member]
Assets:
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	30,198
Total | Fair Value, Measurements, Recurring [Member]
Assets:
Interest Rate Derivative Assets, at Fair Value	534	3,919
Assets, Fair Value Disclosure	30,732	3,919
Liabilities:
Interest rate derivative financial instruments	23,483	26,078
Liabilities, Fair Value Disclosure	$ 23,483	$ 26,078