Disclosures About Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Rate Swap Liability
Total realized and unrealized gains and losses:
Balance at beginning of the period				$ (7,797)
Total realized and unrealized gains and losses:
Included in net income (loss)				863
Included in other comprehensive income
Purchases, issuances and settlements
Transfers in/(out) of Level 3				6,934
Principal payments/additions
Balance at end of the period		0		0
Available for Sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the period	17,678	19,878	18,328	20,838
Total realized and unrealized gains and losses:
Included in net income (loss)
Included in other comprehensive income	140	(238)	(35)	(761)
Purchases, issuances and settlements
Transfers in/(out) of Level 3
Principal payments/additions	97	100	(378)	(337)
Balance at end of the period	17,915	19,740	17,915	19,740
Interest Rate Swap Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the period				5,241
Total realized and unrealized gains and losses:
Included in net income (loss)				(860)
Included in other comprehensive income				481
Purchases, issuances and settlements
Transfers in/(out) of Level 3				(4,862)
Balance at end of the period		0		0
Interest Rate Cap
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the period				424
Total realized and unrealized gains and losses:
Included in net income (loss)
Included in other comprehensive income				(15)
Purchases, issuances and settlements
Transfers in/(out) of Level 3				(409)
Balance at end of the period		$ 0		$ 0